Personally I think the show has too many great moments to just pick one, but if I had to it would probably be when Rick went badass with those guys in the bar when him and Glenn go out to find Hershel in season 2.
I loved season 1 since it was mostly about the zombies, not to say that seasons 2 and 3 are bad. The FX for the zombie deaths just keeps getting better and better. Merle's death probably affected me the most. I thought they were going to rebuild his character a wee bit when he came back with Daryl. At least he took out some of the competition with his last hurrah, good idea with the car.
Not sure what to expect next season. Maybe some new members to add to the group. I think they need to leave the prison, loco Rick needs a change of scenery
Thanks op for the giveaway