Which ones do you like/hate? Which ones screw you over?
How about sudden changes in controller function? Like when you're hit with some confusion/dizzy spell in an action game and your characters starts walking in the opposite direction or just hella wobbly. Is that a decent mechanic? Could be it be made better if the directional controls were not the only controls affected? Would it piss you off if "confusion" threw all of the controls out of whack?
Anything else you can think of ?