I happen to be an almost 9:00 PM bedtimer.  I do get up at 5:00 AM though.  I do it because that's what I prefer.  I'm retired so I don't really have to get up so early most of the time.  But, that's the way my body works.  I am not a napper, power or otherwise.  I just don't function well if I nap.  Strange what our bodies get used to.