During the week I usually go to sleep around 1-3 depends if I go out or not and get up at 6.
In the weekends, I go to sleep at 6-8 and get up again about 4-6 hours later.
In the morning, it's sometimes harder to get up, but I'm never tired at night. Actually, I rarely have the feeling of "now I could use some sleep".
In fact, my doc. told me last week (after some weird things with my heart) that if I continue living like this, it'll shorten my life with at least 5 years for each year.
Well, since those 5 years are at the end, being old, I'd rather enjoy these young years more.