I love the exchanges between Verinari and Leonard. Some of what Vetinari says to him seems to go straight over his head, sometimes he's just distracted with the latest shiny thing... and then sometimes I can't decide whether his genius mind on the same page as Vetinari or if he just trusts Verinari and his pragmatism, like this exchange and the bit that follows:
"The rest of your life," the Patrician answered.

Leonard gave him a measured looking, having momentarily been distracted from the half-dozen things he was always thinking about.

And the Labyrinth exchange also made me giggle :-)