I'm so old, I went to the Cinema in the late 60's early 70's to see Dr. Who and The Daleks with Peter Cushing playing the Doctor and also starring Roy Castle and I was scared to death. I saw it again about 10 years later on TV and of course it looks so tame with those cheap shaky sets.
For the new Doctor, I would love to see Richard Ayoade take the role. His character Moss, in The I.T. Crowd, cracks me up every time I see him (the chemistry with Chris O'Dowd was wonderful), so if he just bought a little bit of that to The Doctor's persona, I would be more than happy and you would never be able to tell whether he was being serious or not.