I have always enjoyed playing in the evening: less crowded, cooler, defining shadows. I believe the word "magical" has been used in prior posts.
When visiting Ireland several years ago, I actually started with a local chap at 8:30 and we finished 18 holes at 10:45 PM. Now THAT was fun, especailly the pint or two after.
I can't touch my toes in the morning, so that pretty much rules out morning tee times.