Well I usually sleep 6-7 hours, sometimes less...even if i go to bed before 12 am i can't sleep. It doesn't bother me...
In summer, i sleep at about 1 or 2 AM, sometimes after that and I wake up at 12 noon :$ :$
Once I didn't sleep for 2 nights, and I slept for an entire day after that...
Yeah, it's ok...i try to get as much sleep as I can now. When I'm older, hopefully I'll be an intern in the hospital but I won't be getting much sleep...