If I have school or work the next morning, then I usually fall asleep 10, 10:30 and I have to be up by 7 to make it on time for 8.If I'm free the next day, then I'll go to bed any time at around 11:30 and 1 in the morning and I usually get up at around 10 in the morning or 11.
Odd thing is, I've never been able to sleep in till the afternoon no matter how much I wanted.