I live on 5 hours of sleep a night. IT's not rare for me to go to bed at midnight and be up at 5am. In fact, that's usually par. On the weekends, I will try to catch up and usually get 7 on friday and 7 on Saturday.
But for the most part, It averages 5-6 hours.
Which is quite odd, as I really love to sleep.
AO