Lately I've been reading the Discworld novels as something I know that I will enjoy no matter who the book features. I've loved the YA Discworld books and the characters that come out of them.
I really hope we have a few more books, a grand finale as you will. It would be nice to see some of the characters from older books coming into a united storyline that connects with new characters. I almost want it to be something big and crazy where characters I know and love die, characters we haven't seen in awhile come back, and the entire fate of the discworld is at stake. I just feel like the latest books have lacked those dire consequences.
That said, I know that no matter what comes out, I will preorder and read over the course of a day or two. As much as I haven't loved the more recent books as much as some of the older ones, they're still better than a lot of the books out there.