My hair is almost always in a ponytail. Part of it is that it's half-way wavy and half-way straight, so unless I do something with it, it looks retarded. The other part of it is that half of the time I'm upside down. LOL I do cartwheels down the hall, handstands in the living room, etc. It's takes too long to do something with my hair, so I usually wear it up in a ponytail to school and around the house.
And I definitely put it up when I sleep too, otherwise it gets in my face.