I go to bed at 10PM for work the next day. But i get 1-3 hours of sleep due to my mild case of insomia. Sucks...i want sleep. Weekends i don't sleep hardly, thinking and doing to much.
2AM-3AM mostly! because due to office i get to the bed in these timings although before office i use to sit until 4AM easily
It varies because of the fact that I mainly work at home. If I have a big project going on, I usually stay up till 5 or 6 AM, and get up at around noon or one.