I enjoy reading about why people like one book of the series more than another. It varies a lot and people have different reasons for liking a specific book best. For me it is and has been since the beginning, Twilight. I just love the discovery and romance and the way it unfolds slowly. Even though the back cover gives away that Edward is a vampire, it's still fun watching Bella figure it out. Also, for me it's the book where I really felt I could identify with Bella.
After that I like Breaking Dawn, Eclipse, and New Moon in that order. New Moon is really depressing for me so that's why it's last.
So what's your favorite book and why?