As I scroll through the various discworld commentaries here, one of the things I haven't seen surface much yet is Pratchett as a dialog artist. My dad and I were both discussing just the other day how we’re honestly happy just picking up any Discworld book, opening it anywhere, and having a listen on what the characters are saying to each other at the moment. I’m not sure what others have created dialogue like that. Maybe Michael Sullivan in his Theft of Swords series.