Older people tend to get up earlier. There is a special place in hell for the Baby Boomers who insisted on a 7:30 start time for our office (though, of course, as the guy who opened every morning, I had to be there earlier). The anxiety that I developed went away when I left and could get up when I wanted to. There are many, many monrings where I lie in bed at 7:30 and think, "I would have had to be a Bukowski quote by now."