Meh. It's a good way to let you know a person's quirks before getting too serious.
When you think about it, if you see a person once every two weeks or so, they easily have enough time to clean up their act, and put up a front. Ya know, let 'em see what you want 'em to see.
It's hard fronting 24\7, mind you, so eventually your real self\hidden quirks will all becoem pretty obvious.