I enjoyed Butcher's Codex Alera series, but I'm starting to enjoy his Dresden Files just a bit more. I like the irreverence and the witty dialogue. The magic satisfies Sanderson's Law and the stories are engaging. I'm normally not a big fan of vampires and werewolves, but the modern day setting is enough to turn the tables.
Butcher has a good feel for pace and his characters are believable and have depth. I also like how he's teasing out Dresden's background book by book rather than by spilling it immediately. It leaves you satisfied, but ready for a bit more.
I highly recommend this book, this series and this author.