i have the time but i literally can't sleep for more than about 6 hours or past 7 am whichever comes first. i'd like to get 8 but i usually go to sleep around 11 and wake up around 5:30 with no alarm. i dont' even have to get up until 6"30. even if i go out drinking and fucking until 5 am, i'll wake up at 7 or so and can't gt back to sleep.
sometimes i'll wake up at 4 am and feel great but don't want to get up. of course on those days i'll be tired as hell by 7 pm!
so i'm voting for 6 since that's what i seem to average.