I have my cycles of "oh my gosh, I need make-up on every moment I am awake" to the "eh, who am I really trying to impress anyway!?" I was terrible about it in college though. Make-up and hair to 8am's and re-apply make-up before band in the afternoon. What the point was, I don't know, since it would all sweat off anyway!
I think I'm reaching the balance now with going without if I have no where to be and I plan on bumming around. If I'm out though to shop, work, meet people, etc... then the face gets put on. The only bizarre thing I still do is put on new make-up before I head out to the skating rink. Maybe I have this crazy notion that the ice will keep it from disappearing even though I'm flying around. Or maybe it's the guys I know I will see...