Vimes and those books following him and Sybil are the best.
Anything with Vetinari is next.
Susan Sto Helit takes a spot here.
Moist von Lipwig follows in after that.
Then Granny Weatherwax and her coven.


I actually couldn't read the book which introduced Mort, though. I read about the first chapter, and promptly closed it and put it away. I can't stand when authors create characters just to kill to prove a point.