Writer Mark Gatiss (The Unquiet Dead, The Crimson Horror, et al) has been chatting to the Ham&High Broadway about the new Doctor Who, Peter Capaldi. Gatiss, who has written the third episode of Series 8, had this to say about The Twelfth Doctor:

absolutely fantastic. Peter’s just got this amazing, fierce, funny,
slightly alarming quality to him – he reminds me a lot of Alastair Sim,
actually. You’re not quite sure where you stand with him; he’s very
funny, but he’s got this glint in his eye and I think it’s a terrific
run of episodes.”
“The brilliant thing about Doctor Who is that it’s always changing like the central character – not just the face of the actor, but the direction of the show. David
and Matt were both wonderful, but both were very human Doctors and I
think it’s time to remind people that the Doctor isn’t always like that.
and Matt were both wonderful, but both were very human Doctors and I
think it’s time to remind people that the Doctor isn’t always like that.
He’s that sort of Tom Baker, Jon Pertwee and even Christopher
Eccleston style actually: it’s someone who’s not immediately going to be
your best friend and can be quite abrupt and rude.”
Eccleston style actually: it’s someone who’s not immediately going to be
your best friend and can be quite abrupt and rude.”
That's a combo I can certainly get behind!
Mind you, to be fair, he's hardly likely to say "oh my god, we've made a terrible mistake, he's rubbish" Not that I think for one moment that he will be!