I was going to say, "You should draw a female dwarf," but then I remembered that in Discworld dwarves of both genders are outwardly indistinguishable, and are both referred to as "he" (interesting concept, that; I rather like it). Does that make you wonder, of Goodmountain and his fiance--whose name I can't remember at the moment--which one of them is female? Because it certainly makes me wonder.

And about the drawing of Goodmountain and William--it is a bit stiff, but I think the stiffness works, in a way. It makes them look kind of tense. I think maybe if their heads were cocked towards each other a bit more, it might make it even better (just an opinion, of course :)). Oh, and I like the design for Goodmountain.