This one is short and to the point.
I don’t have a favorite RPG writer.
I have yet to buy a product and not like it because of the writing. I enjoy many people’s game writing in the books where they shine, where you can tell they are writing what they love, but I don’t think I’ve ever gone out to buy a book solely because who wrote part/all of it.
There might’ve been in the past, but I can’t really think of any right now.