I'm a night owl.
I just noticed that it is 3:30 in the morning and I had intended to get to sleep before midnight since I have a lot to do tomorrow. Part of the night owl situation is due to holiday time-warp. Things just don't seem to keep on track during the holidays. Another part is that I just got a new Mac and I'm trying to figure things out, try some new software and figure out how to get that disk out that got stuck. I figured it out and it was common sense (reboot) but I'm not impressed since I've only had this since Tuesday.
Another part is that I am a true, down to the feather night owl. My mum tells me that as a baby I was always awake. In fact, since I was the oldest, when my sister came along and slept like a normal baby my mom took her to the doctor to find out what was wrong with her. While I sometimes sleep a long time, I generally don't like sleeping too much if I think something interesting is going to happen.
I also remember teachers in school asking me if I got enough sleep. I never did because I was always reading books until late at night.
I've been a bit better the last couple years since I really realized how different I am when I get enough sleep. I know that seems like a no-brainer. In university, you can kind of muddle through with little sleep, but once I had a regular job and regular hours the difference really showed.
I kind of chuckle when I see kids at school with dark circles under their eyes. I wonder if they are also staying up reading despite their parents' best efforts to put them to sleep.