I am really not a morning person; I take forever to wake up, and my cold worse after getting up. Plus, it takes me a little bit to get into the groove of the day.
I prefer the night, hands down. I used to stay up until dawn if I could during my late teens, just chilling on my lappy with Let's Plays and forums. Those days have since past and as a boring adult, I'm usually sleeping before midnightish. However, I remember enjoying the peace and quiet, which I do miss.
If I had to pick a favourite time though, it would likely be the evening. On most days of the week, I'm not working and I can enjoy some down time. When I do work, it tends to be fairly relaxed and non-stressful once supper time passes. It's a good time all around for me, really. Let's just say, I'm so happy to be done with school and not have the burden of homework... (one of the few nice things about adulting post-schooling)