Lets say Matt Smith decides to retire as the Eleventh Doctor tommorrow. You and Stephen Moffat (or someone new, this threads not about him) are at the table deciding who the next Doctor will be played by. Who do you choose and why?
He's a phenomenal actor, see the Wire, Luther and his brief role in Thor. I think he'd be a different change of pace to the last two Doctors we've had Tennant and Smith who've both been kind of manic and weird (more obvious in Smith). A bit more like Eccleston or Mccoy, a more subtle character, where the humour is more cynical and sarcastic. Perhaps with a brusque no-nonsense hands on approach like Jon Pertwee. I like to see how he'd handle any racism (being the first black Doctor), would he be oblivious, would he address it via dialogue or with some sort of variant of the psychic headbutt (enlightenment punch?).
Also for bonus points the villain of the series would be the Valeyard played by Bendict Cumberbatch.

Also for bonus points the villain of the series would be the Valeyard played by Bendict Cumberbatch.