I'm obviously a night person. The only reason I don't agree to do night shifts at work is because the buses don't run as frequently at 5AM as they do at 3PM. I don't want to have to wait 1 hour for a bus to take me home at night when I could be waiting 5 - 10 minutes during the day.
Plus I have other reasons to work during the day...
I become a nocturnal creature during winter , when nights start at 5pm . Winter is the Perfect bar-hobbing/night-clubbing season .. .. because that's when people come together to stay warm , drink to feel warm , etc.
.. .. also gotta watch for the flu and the cold , however .. .. not because the cold has anything to do with it .. .. but because of the greater density of people staying indoors .
It varies. I kind of like mornings, but only when I can get up when I want and there's no pressure to go to school. But I hate afternoons. I always feel better at nght of most days, except for Sundays, for... obvious reasons.