Have you seen Community? It's totally hilarious. Best comedy on tv since Arrested Development.
Revenge! Very entertaining. Mad Men. Latest series of Dexter, True Blood, etc.
Also, there is the new series of Dallas!
One I'd never heard of and we started watching recently is Bored To Death. Very very funny, first couple of episodes a little slow and hard to get into but then you have Jason Schwarztman, Ted Danson and Zach Galifianakis sharing scenes together and it is AMAZING. We've only watched season 1 so far but I highly recommend it.