The biggest complaint I have, is this show wasted good talent on bad writing on later seasons, and the really disappointing thing is the St. Joan arc and the Ali Larter triplets arc seemed to have some meat to them that they never really got to.
I still can't believe so many of you stopped watching it! I was sick this week and am just over halfway through Season 4. And though I admit it's slowed down quite a bit, I still love it.