It depends on the day of the week. On days when I have school, I gotta get my hiney out of bed between 9:30am and 10am. Sometimes I set my alarm for 9 and stay in bed till 9:30. I don't know why, I just do.
When I don't have school, I sleep in as late as my body will allow.
I tend to go to bed between 2am and 3:30am every night. Yeah, even on a school night. If I get more than 7 hours sleep, I'm screwed. 5 - 6 1/2 hours a night is good.
My alarm is very good. Too good. When I first got it, my first instinct upon waking up to it would be to cover my ears. Seriously. And I would always be pissed off, too. Luckily, the effect is not that strong anymore, and I am even able to go back to sleep if I turn it off. When I first got it, the sound would just keep going in my head well after I turned it off, so going back to sleep was impossible.