I have a few:
- No autosave feature. Autosave is so prevalent and useful, it's hard to imagine many games without them. Yet every now and then I play one without realizing it, and when I'm done playing, I simply exit the game only to boot it back up later to start the tutorial mission all over again. It doesn't happen often, but when it does I usually quit playing the game for good out of frustration and spite.
- Player characters who can't automatically step over obstacles which are less than knee-high, especially in first person shooters. I can't count how many times I've been backing away and circle-strafing an enemy only to suddenly stop, caught on something unseen, costing precious seconds during the life and death struggle.
- Shooters where you throw grenades in high, far-reaching arcs as a default. It's always a little frustrating when you tilt your head back in a shooter to get more distance on your grenade throw, only to have it sail way over your enemies heads and blow up harmlessly in the background.
- Aim assist. For some games, I find it's necessary, like with GTA and it's slightly sloppy aiming, but for most other games it simply hinders my efforts. Quit auto-locking to center mass when I'm trying to go for the headshot, game! For this, at least, you can almost always turn it off.