Well puzzle battlers:
I can play a decent game of Tetris or Columns, but when you add that battle element and chain stuff like in Puyo Puyo, I am absolutely the WORST! I get the idea, but I just can't think fast enough to outdo my opponent!
Racing:
I can't steer correctly, I can't brake correctly, etc. Unless the game lets me bump and crash all over the place, I don't stand a chance!
Real time strategy:
I am the World's Worst multi tasker! I just cannot keep track of five different battlegrounds in real time at once!
Platformers:
I think all of us know about me and this kind of game by now.
What are your worst ones?