I was talking with my mom the other day, and she mentioned that she always wakes up at 2, and then again at 3:30, and doesn't sleep well until after that. The 3:30 thing is from long, long ago, when she was a kid; my grandfather was in the army, and 3:30 was when my grandparents would get up and my grandma would make breakfast.
Waking up at 2 is from when I was a kid ... because 2-2:30 is when my dad would roll in from the bar. So maybe that explains my weirdness a bit too. If my mom still wakes up at 3:30 from a routine from 40 years ago, it's entirely possible I'm still affected by my dad's routine that I was still exposed to ten years ago.
Not that it explains everything, of course; some of it is me being stubborn, and working weird hours. But the fact that I rarely get sleepy until at least two may have something to do with my dad's old bar-going habits.
I still have times when I wake up around 3 or 4 or so; my dad always worked a late shift and that's when he would get home. It's a pain in the ass now when I have to get up at 7 or so for a new job :P
God, I can't even imagine getting up that early for work on a regular basis.