Language is my bugbear. Everyone says things now like 'I was sat' instead of 'I was sitting', which just sounds so ugly.
If I want to write a movie, I'll write a screenplay, but if I have an idea for a book, it's something that I think can only be done novelistically.
For years I wrote in my basement. More recently I graduated to one floor above, an office with all my books and music and - ta da! - a window.

