My absolute favorite author's views on Doctor Who. I am a latecomer to the series, I'll admit. And I can't seem to make it through a full episode of the much earlier incarnations of the Doctor. And while I do enjoy the newer additions, I find myself more drawn to the Torchwood spinoff.
At any rate, it is probably not surprising that my views generally mirror Sir Terry's. So for whatever it's worth....Terry Pratchett on Doctor Who