Up until very recently I was staying up until 2-4am and waking up around 12-1pm. Now? I seem to be unable to be in bed past 10:30am, even if I try and sleep in a bit later. I tend to go to bed around midnight too, but that might be more because I have to get myself ready to wake up for a job in the next few days - I'll also have to be getting up an hour earlier than that to be on time, but it doesn't seem to be much of an issue.
I kind of like being a night owl - less people to bug you, and more relaxed times. But then again, I miss seeing the morning sun, and making the most of my day. I may try and fix my sleeping pattern so I can start to see it more.