Season 1 was a great show. Even with the parts I didn't particularly like - yeah, the sisters chatting in the rowboat was dreadful - it still was better than most things you find on network TV. It was a compelling story, well told, with a good cast, and with great moments like the guys defending the old folks' home, and Jim asking to be left on the side of the road.
Season 2, it's still a great show, but I do think it's suffering from sophomore slump. It doesn't feel as scary as it did - almost everything happens during the day, and they have a place of safety. That changes the dynamic. It's still a good show, I just hope they're working towards something that will make it all worth it, and the show doesn't end up eating itself, like Twin Peaks or Lost did.
I loved the scene where they're hiding as the horde shambles by, and the scene with Carol and Dwayne when she brings him dinner, and this recent showdown between Dale and Shane. That was great stuff.