i love a good "late nite" drive. With gas prices going up a bit i don't do it nearly as often, but sometimes i just like being on the road late at night with almost no traffic. It helps me organize my thoughts at times to be honest.
With that said, i hate driving during any "big traffic" parts of the day. I'm somebody who does almost all my "errands" from 8am till noon, or 7pm till 10 ish if i work that day.