It looks like you only play blitz. I play blitz until I'm on a losing streak and then do penance in the form of tactics trainer or chess YouTube videos, or until reality beckons and I have to go do something in the real world. Maybe your opponent just had something to do?
Of course you owe a rematch

I've noticed this too! I mean, I know I suck, so giving me a chance at playing white is just the right thing to do.

"Nothing is more irritating than playing a first game with a new opponent in black and then having the same opponent not agree to a rematch if he/she defeats you. I consider it a complete lack of guts to simply slink away after winning playing white, and have left notes on other players' accounts telling them that."
Easy: you're just butthurt that you lost and can't accept it. Then your ego tells you that somebody you don't even know owes you something, that's the way it works doesn't it? People owe you stuff, just because. Lack of guts or is it that maybe, just maybe, you're not as important as you seem to think you are? And leaving abusive notes (yes, I consider them abusive) on people's walls?
How many times did you leave your room in your whole life? Once, twice?
No one owes you anything. Get over it...
If color is so important, maybe I should complain on the fora every time I get Black 6 times in a row.

I've noticed this too! I mean, I know I suck, so giving me a chance at playing white is just the right thing to do.
At our level, it hardly matters if you are white or black...

wow. those are some sweeping generalizations OP.
for the sake of courtesy and nothing more, often I do accept a rematch. but its not an expression of courage; its like ok, I'm not yet too tired. we'll play another game. but I play my game intensely, and a longer time controls (G30), and so if we have a long 1hour battle (and I always am playing at night anyway)- I just might be tired, win or lose.
why should I throw rating points away playing "on tilt"?
its not smart chess.
.. and BTW nasty remarks are against site policy, rude, and unsporting. do it alot and cc will take action against you.

Nobody owes you anything.
I play in tournaments over the board all the time. I've lost many games as Black. Am I supposed to go to the director and demand that I get White against the same opponent now? Am I to even demand that I get White at all? Many times you get back-to-back Blacks. Barring a very weird case (happens occasionally) where Black is constantly winning or constantly losing across the entire section, you won't get it 3 times straight, but barring the exception, you can get any of the following schedules in a 5-round event:
WBWBW
WBWWB
WBBWW
WWBBW
WWBWB
WBBWB
WBWBB
BWBWB
BWBBW
BWWBB
BBWWB
BBWBW
BWWBW
BWBWW
Over the course of time, you balance out in Black and White. And I'm 100% sure that the author of the original post that is whining and bi*ching about losing to a player as Black with no rematch has done the same thing as White and won.
There are many reasons not to do a rematch:
1) You only had time for 1 blitz game - it was to kill 10 spare minutes you had.
2) You opt to face a different opponent each game
3) You by habit click on New 5 Min once the game is done, and someone accepts before the opponent offers the rematch
4) You face someone that does something that leads to you having absolutely no interest whatsoever in facing him or her again. For me, that's two groups of people. Those that turn off chat (you do that, no rematch, don't care if you had Black and lost in 5 moves, FORGET IT!) and those that play garbage. I'm talking true garbage, not legitimate openings that I happen to dislike facing. You play the Sokolsky? Fine! You play the Latvian? Fine! You play complete mainstream (1.e4, 1.d4, 1.c4, 1.Nf3, 1.g3, 1.b3, 1.Nc3)? Fine! You play complete garbage? Like pre-moves in the opening where it doesn't matter what your opponent does you are going to play the same trash, like 1.e3, 2.d3, 3.g3, 4.Bg2, 5.b3, 6.Bb2, 7.h3, 8.a3. Forget it! No rematch! I don't come here for shinanigans. I'm here to work out opening ideas, work on speeding up the finding of tactics so I'm not always in time trouble over the board. Same with endings. I'm not here for garbage chess!

Until chess.com changes the rules and makes rematches mandatory, you are NOT required to offer/accept a rematch. I dont offer/accept rematches as i like to play different people. I dont have the desire to satisfy anyones ego caused by the loss of an unrated online chess game.
Let me also add this. If you have ever played in an OTB tournament and lost? Did you ask that the next round be delayed so you could play the same person again so its "fair"?
It appears I hit a nerve with some folks, perhaps you are guilty of win and run? Either way, obviously if you play long games (I stick with 10 minute games) than it is conceivable you have a good reason for not playing another, or occasionally there is a legitimate reason to run after winning playing white. However, it is not coincidence that when I look at the profiles of people that have stiffed me without a rematch, that there are a lot of comments posted by others who were stiffed by the same guy. And the fact that your black and white games will eventually even out or that you are required to play black a consecutive number of times is not relevant to the argument. What is relevant is that in the VAST majority of cases, rematches are only refused when the other guy's turn is to play black. See how many times you are refused if you are offering to play black in the rematch. You can deny all you want, but the reality is my original premise.

@Daballs1106 some people in the Internet are just cowards and you should deal with it.
If an opponent plays well and defeats me, I can understand that he/she doesn't want to play rematch. But there are some players who win because of my blunder or even win on time in a completely lost position. Then they run away as fast as they can. Some of them even make fun on me and write some negative messeges. But when you play a lot, you don't care about those players anymore. For example I wait to get an opponent as strong as me, who is polite and plays fair. Then we play many games in a row and even chat during the games. That's the best thing about playing chess in the Internet. But you have to find an opponent like this. Unfortunately there are not many of them.
Running away after a lucky win and laughing at your opponent is not forbidden but it is low class. That's my opinion.
But I don't agree with you about the colour. I think in blitz and bullet games is not really important if you are black or white.

I have blocked OP. Those people commenting about my "only playing white" and then "running" are ridiculous and irrational and completely impossible to reason with.
When some wild-eyed, eight-foot-tall maniac grabs your neck, taps the back of your favorite head up against the barroom wall, and he looks you crooked in the eye and he asks you if ya paid your dues, you just stare that big sucker right back in the eye, and you remember what ol' Jack Burton always says at a time like that: "Have ya paid your dues, Jack?" "Yessir, the check is in the mail."

Until chess.com changes the rules and makes rematches mandatory, you are NOT required to offer/accept a rematch. I dont offer/accept rematches as i like to play different people. I dont have the desire to satisfy anyones ego caused by the loss of an unrated online chess game.
Let me also add this. If you have ever played in an OTB tournament and lost? Did you ask that the next round be delayed so you could play the same person again so its "fair"?
I think you can't compare internet games to the OTB (tournament) games. 1.) For me (and for the majority of people) the OTB games are much more important and serious. I want to improve my FIDE rating but I don't care about the Internet ratings.
2.) The OTB games are usually part of tournaments where you have a definit opponent every round. But in the Internet games I think he was writing about non-tournament (rated or unrated) games, where you can play with anyone.
I don't know, man. All I saw when I looked at your most recent page of blitz games was that you play more White than Black, 13 of your opponents played a single game with you as White (which you hate so much), and 15 of them played a single game with you as Black.
Maybe you should explain this amazing coincidence.
While we're on the subject of personal attacks, I might advise you that everyone who disagrees with you (except newengland07) is higher rated than you and most of them don't bother to haggle their opponents with desperate insults, so you're the butthurt one here.

Until chess.com changes the rules and makes rematches mandatory, you are NOT required to offer/accept a rematch. I dont offer/accept rematches as i like to play different people. I dont have the desire to satisfy anyones ego caused by the loss of an unrated online chess game.
Let me also add this. If you have ever played in an OTB tournament and lost? Did you ask that the next round be delayed so you could play the same person again so its "fair"?
I think you can't compare internet games to the OTB (tournament) games. 1.) For me (and for the majority of people) the OTB games are much more important and serious. I want to improve my FIDE rating but I don't care about the Internet ratings.
2.) The OTB games are usually part of tournaments where you have a definit opponent every round. But in the Internet games I think he was writing about non-tournament (rated or unrated) games, where you can play with anyone.
Exactly my point. If youre arent obligated to rematch in something important like an TB game, why is it so important to get a rematch in an online game that means nothing?

I agree with those pointing to the fact that at our level colour does not really matter... unless you like trying your favourite trick!

I agree with those pointing to the fact that at our level colour does not really matter... unless you like trying your favourite trick!
Now youre entering a whole other topic regarding the importantce of color. But you are right, it doesnt matter at our level, though some disagree.

A search on the word "rematches" returns this...
https://www.chess.com/forum/search?keyword=rematches
"rematch" returns this...
https://www.chess.com/forum/search?keyword=rematch
Nothing is more irritating than playing a first game with a new opponent in black and then having the same opponent not agree to a rematch if he/she defeats you. I consider it a complete lack of guts to simply slink away after winning playing white, and have left notes on other players' accounts telling them that. Recently, someone commented back to me that there should be no expectation of a rematch, ands that he found my language offensive. My response back is that he is a hypocrite, and here is why.
True, there are no rules governing this on this site, but there is precedent in virtually every organized sport, particularly when it is two opponents facing each other, that should the game offer an advantage at the beginning for one, than it equals out by offering the same advantage to the other before the match concludes. In tennis, each opponent has an equal number of games in which to serve. In wrestling, should one opponent have the top position first, the other opponent has the top position next. In many cases, a coin flip will offer an opponent or team an advantage at the beginning of a game, but usually the sport is structured to equal out the advantage either at the beginning of another quarter or half. In other words, there is an expectation of fairness or, as some prefer, etiquette.
So, even though chess.com does not require playing rematches if you win playing white, it doesn't make it right, and there should be a subtraction of points should the player refuse. What is worse, if you review the other player's games and see he doesn't offer rematches before you begin a game and decide not to play, chess.com admonishes you for not playing.
Finally, to the player who took exception to my language, I would question why he would have an expectation of proper language when he doesn't even think good sportsmanship should be expected by members of the site. In conclusion, I still say that if you refuse to offer a rematch when you win playing white, you are a poor sport, your rating is misleading and more likely than not you are a coward.