I answered "inconsistent" because of my work schedule and balancing it with my family schedule. My work week is Wednesday night through Saturday night. On Sunday (today) after I get home, I'll be with my daughter for several hours and give my wife a little time for herself. I'll go to bed sometime between 2 and 3pm, but then will get up at around 6pm and be with my family for a bit, go to bed around midnight. Monday and Tuesday I'm normally awake from about 6am until about midnight. Wednesday, I will go to bed about 3pm and will get up at 9:30ish to get ready for work, and that's my sleep schedule for work nights (3pm-9:30am.) My circadian flips twice a week, which would probably drive some people crazy, but it works okay for me. I've been doing a very similar schedule for over 10 years now. If I had the ability to do it and still have time with my family, I'd be up all night every night and sleep probably 2pm-8pmish or 3pm-9pmish. 6 hours seems to be the proper amount of sleep for me, I'm super tired if I get less, and strangely enough I'm also super tired if I get very much more than that. A few weeks ago, I fell asleep at about 9pm on Sunday, didn't wake up until 7am, and felt weird and crappy all day.