I'll add to the bandwagon on the Dresden Files; they're funny, snarky, violent, magical and good fun. As for other urban fantasy stuff, hm. I've liked Charlaine Harris' Sookie Stackhouse books okay. They get a little romancey, but she has a good cast of vampires that are more than cardboard. "BENIGHTED," by Kit Whitfield, is a pretty good werewolf novel, in a world where most people are werewolves. The HOUSE of NIGHT series for "young adults" by PC and Kristin Cast are interesting, in a "growing up vampire" kind of way. I don't like how each book leaves off with major threads untied, though.