im usually in bed by 10:30-11 on weekdays, a little later on weekends. also im flat ass asleep within 10 min of getting in bed almost always.
I need to be having a lot of fun to stay up past 11:30.

It just an internal clock thing. I'm a morning person. For example, I can stay up drinking w co-workers/friends, pass out at 3am, and still wake up by 7:30 at the latest with no alarm. It sucks for me when every1 is sleeping but I usually just go for a walk and come back w breakfast burritos.