I initially thought The Walking dead was a really good series. then it just turned into recycled stories after the first 1 1/2 seasons and I lost interest. People are rabid about it though and I've had a few tell me it is a way for them to visualize a catastrophic collapse and learn how to deal with it.
Now, I think we all know that this isn't much of a realistic learning tool for survival, but I guess a lot of people don't get that. the point is that I think a lot of people are secretly interested in surviving a catastrophe plagued with occupying enemies.
At any rate, it doesn't do it for me like Breaking Bad did. I can get hooked on a show, but it's rare. BB kept me itching every week because just when you thought things couldn't possibly get worse, they did and the script was fresh every week. the zombie thing ran it's course for me after 1 season
If you gave up during season 2 I suggest you give it another try. Season two (the house in the woods) was the worst season for TWD and I almost gave up on the series halfway through season 2. I stuck with it, however, and starting with season 3 it got much better and I've been addicted ever since.