I went out and blindly bought season 1, never having seen an episode. I plowed through that entire season in one sitting about a week ago, holy shit was I blown away. Then I watched all of season 2 over the past couple of evenings.
I am probably in the minority saying that I prefer season 1, mainly because we still aren't exactly sure what's going on with Brody, season 2 solidifies Brody's place, except for the finale.
I really have no idea what to expect for season 3, I have a feeling Brody will be in the middle east somewhere, trying to either figure things out from the inside, or reveal that he was actually part of a bigger plan of getting Nazir caught, seemingly to throw off the CIA.
There are probably holes in that theory, but I really have no idea how the showrunners say that they MIGHT include Brody and his family in season 3, how would the family be included if Brody wasn't?
Also, Quinn's entire situation was probably one of the best things of this season. I really hope they continue with that.