The second best TV program in a long time after Game of Thrones in my opinion, but I've got a feeling it's going to get lost in the "we want more zombies and more blood 'n' gore" request masses, rather than the society, morality and psychology element it was written for.
No doubt it'll still break cable records either way but season three's just not been as deep as season 1 and 2 for me.
I discovered less than 2 weeks ago; there is a real, live subculture of folks out there who truly believe there is an imminent zombie apocalypse. Many of them have purchased elaborate underground bunkers and various powerful weapons.
By the way, the best show on TV is Modern Family. Hands down. Finally a worthy replacement for Seinfeld. I really appreciate humor that isn't contrived and dumbed-down. You either get the one-liners or you don't.
Don't go thinking that the show is popular and therefore unworthy; it's popular for all the right reasons, as was Seinfeld.