Generally speaking, I go to bed around 11p, hopefully asleep before midnight. Doesn't always happen, sometimes I see 1a. On an ideal night I sleep through the night and wake up at 8a. I don't have to be at work until 9a. When I was in radio and had to be at work at 8a, everything shifted back a bit, though I still usually fell asleep around the 11-midnight range and was up at 7a. Sometimes on the weekend I sleep until 9a... very exciting. As to when I go to bed on the weekends, um, I try to be good, keep the routine, and go to bed at a decent time, but that usually means I crawl into bed around midnight and might be asleep by 1a... or later... My natural sleep cycle is like 2a-10a. If left to my own devices, with nothing else to do, (like when I was on vacation for a week and a half) that's when I get tired and when I wake up every day.