0300-1200 is closest to me. I always joke that I'm nocturnal. If left to my own devices, I usually go to sleep between 0400 and 0800, and wake up between noon and 1500-1700.
I sometimes wonder whether some people are able to function & survive on less sleep.. and others need more. I need at least 10 hours of sleep per day...
I sleep when I feel tired. For the past few months, I'll fall asleep around 1-2am and wake up at 5-6am. Then I sneak in a couple of more hours later in the morning or late in the afternoon.
On a school day, I'd say around 6. On a non-school day, 9-10. As an overall average, I guess 7-8 would be accurate... my sleep pattern is too erratic for me to be sure :/
I sleep more in the winter. I struggle to stay awake until 10pm and nap on weekends. But I'm always up by 6:30am. Now that summer is near, I find myself up past midnight. But for some reason, I found myself sleeping till noon today, lots of crazy dreams too. So it's not always the same schedule.
I don't have a pattern really. I usually fall asleep in the early hours of the morning and I can wake up in the AM, afternoon or every now and then 4pm.
During the week, I sometimes get less than 6 hours of sleep and I'll take naps to try to get the required amount. My typical night schedule is usually 2-4am and ends at 9am.
It drifts later and later during school holidays. Lately it's been around 3am to 1pm, but 1am to 10am if I've got an exam in the next afternoon :)
It's frequently accompanied by an afternoon-evening nap too, especially in the summertime ^_^