it depends on u..
but i'd vote blitz. more games = more experience
where can you improve your chess skills more? in playing blitz or playing long games?

Long games are better, enough time to think and plan, and then after the game see why your plans did or didn't work...etc.
Blitz games are more of a regurgitation of what you already know.

Well, if you want to be better at blitz, I would play blitz.
my thoughts exactly.
blitz teaches me to F around and avoid results while my opponet's timer runs off. online teaches me to use my pieces well and to play for checkmate. at least i think it does--it's supposed to.

Well, if you want to be better at blitz, I would play blitz.
IMAO If I wanted to get better at blitz I'd actually play more long games than blitz games! Because I think the ability to play good blitz comes with being a good player in general and I think most will become better all round by playing more longer games.. All of the great Blitz players I know of have all been amazing long players by trade (Fischer, Capablanca, Nakamura to a lesser extent)..

Another useless comment by the simplton.
Blitz games are for practising what you already know, longer games are for improving, especially if you study a new opening, and then try it out in one of your games, trying to make things work will give you a good understanding, win or lose.
Now I said I wouldn't say anything next time you utter something like this after you complained when I was making my feelings about you known, but this just takes the biscuit. To someone who's always attacking people left right and centre that are what he apparently believes insulting people who are just trying to learn (you're usually wrong about that aswell anyway) I have to once again point out your utter hypocrisy and I'll be delighted the day you leave this site.
"I can cope with people being rude, but I try to help them and make them see that there is merit in being polite."- RainbowRising.

Playing blitz will sharpen up your blitz techniques, not much more than that. Handy in severe time trouble and another way to practice and run through some openings.
I guess it depends on what your goal is ,if you want to get better at blitz then by all means play blitz. If on the other hand your wanting to play high lvl chess then I suggest you play slow meaningful games where it gets a bit deeper than 2 move tactics.

I use Lightning Tactics (~3-10 seconds) to improve my Blitz performance.
I use Blitz Tactics (~3-10 minutes) to improve my Standard performance.
I don't play games for the sake of improvement. If I did, I would just repeat the same mistakes over and over. Nothing of value would be gained.

I'd say 60-97 minute games are best the quality of your opponents matters if you want to benefit seek out the strongest players you can find at your local Chess Club you'll get beaten like a drum and you'll lose many games but you'll become a better and sharper Player and improve your skills and technique.
Good luck!

Another useless comment by the simplton.
Blitz games are for practising what you already know, longer games are for improving, especially if you study a new opening, and then try it out in one of your games, trying to make things work will give you a good understanding, win or lose.
Now I said I wouldn't say anything next time you utter something like this after you complained when I was making my feelings about you known, but this just takes the biscuit. To someone who's always attacking people left right and centre that are what he apparently believes insulting people who are just trying to learn (you're usually wrong about that aswell anyway) I have to once again point out your utter hypocrisy and I'll be delighted the day you leave this site.
"I can cope with people being rude, but I try to help them and make them see that there is merit in being polite."- RainbowRising.
What do you say to that then punk? I notice you have a rather convenient habit of leaving when you have something to answer to.

you're so mean richie...at least tell him which word he misspelled.
atomic...let that poor dear rest. he's fatigued from trying to save the planet before bedtime.

Oh and to the original poster (sorry to bring our grudges here), I have found in my limited experience that you can't really be any good at blitz until you have at least a very strong openings foundation a fair amount of long play, and some good tactics practice. After that, I suppose you could practice blitz to get better at blitz. But before that, it's like spinning your wheels in the sand/mud.

Maybe I don't have anough qualifications to air an informed oppinion. But all that I heve seen is that top blitz players are also top long chess games players. Maybe the correct path is to be good at long chess games first, for be a good blitz player.
Playing long at the begining so that the left side of our brain gets comfortable with the moves, and eventually playing blitz !!!

Which playing skills? If you play only long games then you'd probably be not that good at blitz, and vice versa. But generally "chess skills" refers to rating, titles, so it's connected with long games. So you have to play long games + blitz as a tool to practice openings, time trouble situations, etc.
where can you improve your chess skills more? in playing blitz or playing long games?