I enjoyed the show very much in it’s debut season. Then I tuned into season 2, and it already started to “get old” halfway through the season. However, I was curious, so I stuck with it to see what happened up to the finale of that 2nd season. Didn’t even start watching the 3rd season, and I haven’t had any interest since.
Season 2 was filmed on “the Farm” because AMC made a financial decision to pour money into “Mad Men” then “TWD”. That irritated a lot of viewers because the show characters were just kind of going through the motions.
During that time frame AMC realized that they were losing a ton of money they shifted focus and now TWD is big budget. It has developed into a Man vs. Man show and the zombies are only there to keep everyone on their toes.