Difficult choice. I think the only writer that makes me want to read everything he's ever written in the French author Marc Levy. You probably know the movie Just Like Heaven with Mark Ruffalo and Reese Witherspoon. That movie is based on one of Levy's books, If Only It Were True. So if wanting to read every book he's written makes him my favorite writer, then that's what he is for me.
But honestly, I have a lot of authors that I love and try to read as much of their works as possible. I'm really weird, if I get to read something by an author and I like it, chances are really high that I'll like his/her other books.
