You can learn a lot about a persons' temperament by playing a game of cards. Especially when score is being kept.
I find it is easier to loose (sometimes on purpose) and let others win so they can go to bed in a good mood.
Next time you play a game of cards try to loose (don't be too obivious) and you will truly make those who "win" happy. But, we really know who the happy ones are!!!!!