Wow my sleeping schedule is similar to yours, asleep at 10:30 - 11:00. Wake up at 3-3:30 I'll read or watch some tv then back to sleep and up again at 5 am. I've lost about 20 lbs this year and I don't need as much sleep. Also I drive my family crazy on vacations because by they time they get up around 7:30 or 8, I've already been up for a couple of hours and am ready to get going.

I don't know how much sleep you need but 8 hours seem too long for me.