Normally get 6 hours or so, into bed sometime after midnight, get up at 0630 to get ready for work. Usually get about 8 hours at the weekend, have been known to survive on about 4 hours sleep but am usually pretty ratty or hanging out of my arse by the afternoon.
Work shifts so average about 6 hours, When working night I usually get 8 hours. When working earlies (Have to get up at 04:45) sometime as little as 4 hours. Fill like shit at the end of the week.