This is how i see it: roleplays are an interactive, ever-changing medium with plots, characters and settings molded by the players, with a focus on the process, not the end result (although a well-written roleplay can indeed be an enjoyable read). Books are wholesome and complete literary works that are most often written with the intent to convey an author's ideas and thoughts or fantasies through storytelling. I may be far from an erudite, but i can certainly tell that while sharing form, the substance of those two is somewhat different, meaning that one certainly can't replace another. So yeah, i both roleplay and read books.