Smallville

I've been watching it since season 1. It has evolved from a simple story pattern to a much more continuous and complicated story of the relationship of its main characters. The switch from repetition to complexity is definitely a smart one because the show became not at all superficial and was able to keep some long-term audience(Like the way I think CSI NY is successful).

However, I think the script writers are definitely running out of inspiration and kept pulling the trick of adding in more characters to make the show interesting. I don't like this that much.