To be honest, I don't know what I think of Capaldi as the Doctor yet. He plays it wonderfully, but somehow, this regeneration still seems a bit flat. One thing I thought the earlier seasons of the new series did well was character development. I feel as though, starting with Eleven, we've been missing some of that. On the other hand, the monsters have gotten drastically better. Some of the earlier monsters were downright laughable. Moffat has done very well on that front. I just really want the Doctor to be more fleshed out as a character.
Anyway, that's my two cents on the show at the moment. I'm still really excited for Season 9, even though I won't get to see it until 6 months from now. (stupid Dish not giving us BBC America )