I would say season 3 of TWD was the weakest by far after two very strong seasons, so if you didn't think much of the first two I wouldn't bother with the third.
Disagree. I didn't care for season 2 of The Walking Dead, and much preferred season 3. The location was better, the new characters were great (Michone is my favourite character in the program) and the most annoying characters "left". What more could you want from a program!
That said - I'd agree that if you didn't like the program after watching the first two series of it then it's probably best to just give up on it.
Really looking forward to Luther returning to the Beeb next month. In fact, I might go dig out the first two series and watch them again. Great TV - and it won't take long to rewatch since there ain't many episodes each series.