Sir Terry Pratchett has been guest editor of SFX Magazine this month, and has written an article about what he doesn't like about Doctor Who.
http://www.sfx.co.uk/2010/05/03/guest-blog-terry-pratchett-on-doctor-who/
Basically, Doctor Who suffers from poor pacing, and relies too much on deus ex machina to be considered 'proper' science fiction.
I have to say I agree with most of what he says. Not enough internal consistency and too many maguffins - at least Star Trek obeyed most of its own rules most of the time.
http://www.sfx.co.uk/2010/05/03/guest-blog-terry-pratchett-on-doctor-who/
Basically, Doctor Who suffers from poor pacing, and relies too much on deus ex machina to be considered 'proper' science fiction.
I have to say I agree with most of what he says. Not enough internal consistency and too many maguffins - at least Star Trek obeyed most of its own rules most of the time.