I kind of feel that the Walking Dead is in a bit of a rut.
I don't feel that "just surviving" is an engaging enough premise to keep a show running. I loved the first season as there was movement to different locations, trying to figure out what was going on, getting radio messages from other groups, finding the lab.
I feel like the characters need to be working towards something - a safe haven, a cure, anything. Something to focus the drama. I am into the characters which is what keeps me watching, but being stuck in the house in the second series, and now being stuck in the prison, its just too stagnant.