This is a bit old but I've just found it; Charlie Brooker interviews TV writers who talk about their creative process, and there's Russell T. Davies and Graham Linehan among them.
Click to view
(Here are the other parts:
part 2,
part 3,
part 4,
part 5 )
It's extremely interesting and also comforting to hear other writers going on about how difficult it is to write professionally and what kind of violence you have to do to yourself to get down to it, and what a brutal, horrifying process it is. I feel much better now that I've heard other people (especially Davies) describe how miserable they are when they're working on a script, and how much they hate writing but love "having written".
I also found a cool article written by Brooker for The Guardian that completely applies to me:
http://www.guardian.co.uk/commentisfree/2010/aug/16/charlie-brooker-writing-deadlines And finally, this quote:
“All writers are vain, selfish, and lazy, and at the very bottom of their motives there lies a mystery. Writing a book is a horrible, exhausting struggle, like a long bout of some painful illness. One would never undertake such a thing if one were not driven on by some demon whom one can neither resist nor understand.” (George Orwell)