I read a LOT of genre fiction this year. I regret nothing!
Soulless; Changeless; Blameless; Heartless by Gail Carriger
When I started the first book in this series, I wasn't quite sure if I was going to like it. It was a bit twee. But as it went along I completely fell in love with the main character and by the end of the first book, I was hooked. I wish there were twelve more so I could keep reading them.
Double Dexter by Jeff Lindsay
I dunno, I just love these books. This one was particularly difficult to put down.
Snuff by Terry Pratchett
V is for Vengeance by Sue Grafton
I put these together because I just wanted to say that it's amazing that the Discworld and Alphabet Mystery novels are still so good.
The Wedding Plot / Jeffrey Eugenides
Other than Freedom by Jonathan Franzen, this is the only really literary book I read this year. I also enjoyed it quite a bit and look forward to re-reading it someday.