Hehe, very good thread.
I always place my knights facing each other. And I will keep them in this position until the end of the game, so I always know which one was the b- and which one the g-knight.
I believe this is the only correct piece placement, though a lot of people make them face to the right; probably because chess programs display them this way.
I also try to show up before my opponent, so I can make his knights face each other too; and I am bothered if he turns them afterwards.
Strange behaviour; i guess, but I have seen worse...