I love night riding but lately deer have been insane.
One thing I really loved is riding through Downtown Atlanta on a weeknight around 10pm. All the working people are home and the drunks are still at the bars and the streets are fairly clear. But you are riding around looking up at beautiful sky scrappers. Plus because of Atlanta's diversity I get to see all kinds of bikes when I ride.
Here is an example with a guy and his girl on a CB550...
http://www.youtube.com/watch?v=DX0Nb6RUKxE