Nightwatch is sitting on my nightstand, waiting to be read. The Vimes books seem to be getting better and better, so I am really looking forward to it.
I too loved Moving Pictures, but I thought Gaspode really shone in The Fifth Elephant. That was a wonderful book.
I am curious, did you read Small Gods? At first, I didn't think I was going to like it, but it really grew on me towards the end.