Discworld character studies

I'm painting my way through some of my favorite Terry Pratchett characters, trying to capture what I think is a realistic version of these classic characters--like what would Sergeant Detritus look like if you met him on the streets of Ankh-Morpork?

Sergeant Angua of the Ankh Morpork City Watch

Sergeant Detritus of the Ankh Morpork City Watch

Sir Samuel Vimes, Commander of the Ankh-Morpork City Watch, Duke of Ankh--also known by the lofty title, Blackboard Monitor

Corporal Cheery Littlebottom

Carrot Ironfoundersson

Havelock Vetinari, the Patrician of Ankh-Morpork