I don't see something wrong with your play, apart from improper positional understanding- which is common at your level, and nothing to worry about... you can fix it by more study, and playing more games/ gathering experience.
I was more puzzled by this game:
http://www.chess.com/echess/game?id=72071474
You resigned in a position where black has an easy draw, and he doesn't have to find "only moves"- he can draw in many ways.
More than that, Black is actually winning after 24...a5, but here good calculation is required- nobody would blame you for missing it.
In that game, I was thinking quite vaguely. I had like 5 other games going and thought "Oh no, the king can infiltrate on g4 ." So.. I resigned, the worst possible move in the position :)
Maybe another point I just thought of is that you're afraid of tension in the position eg. pawns squaring off, and prefer playing games where there aren't many things to have to keep track of. It's easy to see how this could turn into "simpler" and even "more positional".
This is true. Absolutely true.