I hate sleeping in
I've always been a morning person. I used to get to bed around midnight and then get up @ 4:30am to either jog or do weights (but I wsa a single mother @ had a full-time job, and the gyms & I had to fit my exercise in around my daughter and my job).
Even now (that I'm not in paid employment-my husband would die if he even uttered a word relating to my home duties) as I'm studying, and have a whole farmyard of animals, housework, gardens, and my exercise to fit in everyday, I have to get out of bed @ 6:30. My body is conditioned to wake up then. I generally am awake just before my alarm goes off. Its just a matter of conditioning your body, and getting a better sleep (deeper). If I don't get the proper type of sleep then I feel like crap, and the day is basically shot to hell.
When I was really into AR (Anthony Robbins) I had conditioned my body to need only a small amount of sleep. If I ever sleep in to 9am then I really get behind schedule and I really hate that, so because I relate more pain than pleasure with sleeping in, I never really do.
When my husband and I do country markets we are up @ 4am anyway (well I'm awake and he's comatosed till around 10ish, and thats after an IV drip has been inserted with java).
AT the moment I am getting around 6hrs sleep a night and not suffering at al.