I was a huge night owl as well. Used to stay up until all hours of the night and be out with friends until 1-2 AM. For some reason I always had more energy at night then during the day. But once I started working full time, I was working 6 AM - 3 PM and would have to wake up around 4:15-4:30 AM...that KILLED me. It was brutal, I had zero energy in the afternoon and weekends I was dead. I would try going to bed by 8 PM but I couldn't fall asleep until midnight. I ended up having to switch to do a typical 8-5.
If I could though...I would love the earlier day, I wish I had the energy to wake up 5-6 AM. I actually grew to like some aspects of it but it was killing me. I don't know how people do it. I guess they must get like a solid 8 hours of sleep. My problem is I wake up every 2 hours or so.