I like a couple of things about getting up in the morning.

It's easier to schedule (or more resistant to having your workout knocked off the day's schedule). Once you are done, you can go to work very awake and very alter. And youneed less coffee.

And, even if everything else during the day turns to dirt, who can at least say that you got one good thing done!

It does kind of require one to retire early in the evening, rather than spend all night at the pub though.