For me he's also the most human of Pratchett's characters. He is angry - and angry about the right things - but he's always undergoing an immense struggle with himself to be a good person, to do the right thing, and to not give in to what the world could make him.

I think Pratchett once described Vimes and Granny Weatherwax as people who are naturally destined to be very dark, or even evil - the villain characters - and spend all their lives fighting destiny and creating moral frameworks for themselves. I really like that. They both have a very unusual style, and ways of living well, and it's very compelling.