List of game mechanics you dislike.

MMX

The title should be self-explanitory. Here's my list as an example:
1. Sloppy recoil control in an FPS where the gun's recoil can eventually make you look straight up.
2. Once you get spotted, you can never hide. Luckily some games avert this.
3. Multiple loading screens in a row.
4. Slippery controls, especially when you have to deal with small platforms.
5. Checkpoints around every corner. In my opinion, checkpoints also shouldn't be savable, depending on the length of the level.

sunman502

How's about cars cornering in some of the racing games? Cars in the racing games have some of the poorest cornering rating that I have ever seen. It seems like every time you make a right turn or a left turn at a high rate of speed in those games. Your car ends up in a building or a ditch.

DeliciousSpatula

Pay walls that are unnecessary.

I'm looking at you, app games. Even if you are my guilty pleasure.

MMX

The game is done loading the level/area, but it still needs to load the graphics completely.