I've been enjoying this season quite a lot. Blink was an amazing episode, and Utopia did it's big reveal extremely well. Human Nature/Family of Blood was probably one of the best episode arcs of New Who. I even enjoyed Daleks of Manhattan/Evolution of the Daleks, Gridlock and 42 quite a bit.
My least favorite episodes have been The Shakespeare Code and Lazarus Experiment. But even then, the worst Doctor Who is still better then 90% of the rest of TV out there.
I'm slightly sad that there are only two episodes left, after which we won't see the Doctor again until Christmas.