TWD turned much more dramatic during the second season. People like the show because of the characters, IMO, and not just to be scared by zombies. I have never read the graphic novels, but I believe it should be more action packed in season 3 from what I've heard.
I think we think we know what to expect in TWD house, so for now we don't have much to get excited about. Whereas other houses have given us a concept and we are letting our imaginations guide us on what to expect.