Thank you, joelsd! He sent me a copy of City of Villains, the evil-oriented expansion to superhero MMORPG City of Villains. So far I've made a top hatted thug named Mister Punchy, a big silver robot named Robo-Boombastic, a creepy bipedal dog man called Professor Puppy ("Peanut" was already taken), and a delightful young lady clad in leather and fishnets named Miss Trick, who fights the forces of good with her army of dancing robots. Oh, and a great big gun.
I still have to make a character with an exposed brain. I think that's essential.