I like playing in the morning. Get up, have breakfast, take out the dog, and hit the course. Probably 8:30 is my favorite time. Can get in breakfast and a little warm up without having to get up at 5:30! Though I kind of like dawn rounds too. There's something nice about getting up in the dark and teeing off in the gloaming!
Honestly I play whenever I can though. If a twilight round is what I can get in, then hell yeah I'll play late.