OCD things you do in games.

[retrolinkx]

You know, that thing you ALWAYS do in any game where something comes up.

For example, I always pick up collectables whenever I see them, even though I know I will never find them all, because I never invest time into game to do things like that unless I really like it.

Whenever I find allies in an FPS, I will usually try to give them weapons and such to keep them alive for as long as possible, even going back checkpoints if I fail to keep them alive.

Reloading after every kill/shot.

Probably more, but I can't remember.