I gravitate toward books rather than visual (and it took me an age to figure this out--) because while I pick up the author's prose style from books, I pick up the director's cinematography from audiovisual, and that's not actually something that lends itself to writing.

(Similiarly with comics, where if I try to write a comics fandom I am basically trying to novelize the comic that exists in my head. Audio drama's a little easier though.)