I am a HUGE Stephen King fan and alot of his book I either own or have read. I am by no means a fanatic, but I would like to consider myself a big fan of the man.
As for his books, Joyland I have not even heard of, but I will have to look for it. Storm of the century and The Stand were a couple of his earlier ones that are always a fun read. Salems Lot was excellent and Cujo was very captivating..least to me it was.
Far as I know...IT and Storm of the century were two of his books that went to movies and were fairly well received. I still have plenty of his material that I need to read, but he is one of my favorite authors to read besides Poe and Janet Evanovich.