Hehe, another one of these. Ill repost my best:
1) When you are getting frisky with the wife, and ask for docking permission.
and some others...
2) When you are playing and a family member starts talking to you and you think "Great, they just introduced ship crew!"
3) You keep looking for the turbo button in your car.
4) You get annoyed when stuck in a traffic jam because there is no Z axis.
5) You get annoyed when stuck in a traffic jam because you can't switch to solo mode.
6) You think all other drivers on the road are griefers.