Type A:  You were dominated from the start and could never muster any resistance

Type B: You had equal chances and were eventually outplayed late in the middlegame or endgame.

Type C: You almost won, but couldn't find the right continuation to drive the full point home (and ended up losing as a result).

B for me. It least it seems like it in the games I've looked at.

"B" pour moi as well.

I am a mixture of types B and C, but type C, depends on my mood,

type A could be in need of opening pratice? When I started out,

I learn from Type A the most...I can just quickly go look up the theoretical move I didn't play which got me into trouble

type C I have a LOT of losses from that....dunno how to minimize these losses though.very often I get this advantage that looks decisive,I desperately look for the knockout blow,can't find it,and blunder somewhere due to time pressure and lose.these losses hurt the most.i'm doing tactical exercises every day to rectify this but I suspect this problem won't entirely go away.

When I was losing all the time, I learned how to avoid getting in bad positions so quickly. But I definitely learn more from my wins now, than my losses.

FM Drawyah has the right idea. Almost all of my losses contain useful lessons.  But the ones I hate to look at are the Type A losses, where I was dominated from the start. It's really depressing watching me get crushed like a total patzer. But there's a lot to learn from these. Generally I've either made a serious misjudgement in the opening, or I've missed a strong freeing move that would have kept me in the game. In either case, I have had a significant failure of understanding, and it's really worth the effort to go back and try to understand exactly how I managed to get it wrong: What were the positional factors I over looked? or what was the tactical refinement I missed? There's a temptation to ignore these embarrassing efforts and move on, but there's a lot to learn from your debacles

For me, I tend to learn the least from type C, and more from Type A and B. This is because of my own frustrated ego, where I don't want to even look at games I should have won because they just piss me off. It's a bad habit for sure.

Against better players, I had lots of type A games. For me, these are most frustrating. At the same time, these were also the games that eventually convinced me I needed some serious opening theory study, and I'm thankful for that now. It's simply not true that grasping principles of development are enough to get by for long. In post mortem, I still peruse every single game of mine (even those won) especially regarding to where the first "out of book" move was and if I could do better at that point next time.