Some of these are hilarious!
Here's my list of quirks:
1) I have leaned into corners when playing driving games and for all I know I still do. In fact most people that I have seen playing racing games lean into corners. However, I have gon a step further and occasionally flinched away from impending crashes.
2) I have tried to peer over hills or around corners displayed on a monitor
3) I sometimes duck or dodge when shot at in a first person shooter.
4) I used to dream I was playing Doom (seriously!) Oddly, when I confessed to this, my brother and father, who were both also hooked on the game, admitted to having the same dreams. Not scary dreams but dream that we were in the game, sort of like Tron or something...
5) I have jumped with fright many times in Doom when running around a corner and bouncing off the belly button of a 12 foot tall monster with a rocket launcher or two. I even jumped when I heard one roar once and didn't know where it was.
6) I write stories about cars I drive in GT4 and talk as though I was driving the real thing.