You don't see it but I think most people do. There's something of the night about this Doctor.
There's "something of the night" in every Doctor. Four had his deadly serious moments, too, so did Three and One was officious and dour for most of his run.
I'm only reacting like this because it feels to me like people have too easily forgotten that there were eight other Doctors before the crop we're discussing, and the newbies are all light-years behind a couple of the old guard in terms of sheer awesomeness. In my eyes, that makes the debate about whether Nine, Ten or Eleven is better or more mature or what have you pointless. None of them will ever match up to Four. None of them will ever match up to Three.
(deep breath) Rant over. Back to the sub-topic.
There's been a Regression of maturity. Nine was most mature, but with a frat boy streak. Ten's maturity came with screeching and whining. And Eleven...sorry...is a man-child with ADHD. It's just blatant.
I agree with you re the classic Doctors, hell we've yet to see a modern Doctor treat their companion quite as viciously as Seven treated Ace in Fenric, and yes it was to save her life but still...
I'd disagree about Smith though, personally I just see him as a cantankerous old man trapped in a young man's body, yeah he's been a bit ADHD of late, but I thought he was quite restrained in Manhattan, and I get the impression that his Doctor is going to calm down a little when Clara shows up.
Nine was great, and I've yet to see either Smith or Tennant come close to the sheer hate/terror he showed in Dalek, but by the same token, I somehow doubt Eccleston would have been able to play the meeting with Sarah Jane with anywhere near the emotion/exuberance of Tennant.