I stay up til around 1:30 to 2:00 every night. I get up at 6:30 to 7:00. I know that's not enough sleep, but I just don't feel tired until around 1:30, and if I go to bed, I'll just toss and turn. I have sleeping pills that work ok, but I've had a few bad experiences with those too, such as really freaky nightmares.
I go to bed anywhere from 11-3am but wake up at the same time in the morning without fail. It just all depends on how much I want to short sheet my sleep as to when I even attempt to go to bed. Sometimes I just stare at the clock for 2 hours trying to pass out.