Every game.
I can't play shooters, fighting games, and most action games because fast-paced games make me panic and lock up. I've never tried playing a strategy game, but I'm sure I'd be terrible at those too.
I really enjoy adventure and puzzle games, but I always end up looking up hints online just because I hate trial and error so much. I have to know if I'm on the right track or if I'm just wasting my time. So I think that means I'm bad at them.
I guess I'm not bad at RPGs (on easy mode), but most of them are just so tedious. Same with simulation games.
I'm pretty good at rhythm games though!
So yeah, only once in a blue moon does a game come along that I a. can play and b. enjoy.