While I am not the biggest fan of his horror fiction, I love what happens when someone does a movie based on one of his books. Furthermore, I think that his book, On Writing, A Memoir of the Craft, rivals even The Elements of Style for being a necessity to every writer. If you desire to write, you need to read and re-read both of these books. You should also look over his FAQs, specifically the section on writing.
Recently, I discovered another reason to like and respect the horror writer. He has this page at his website titled Stephen King Dollar Babies. It is a place where a film student can buy rights to one of King’s works to do a film project. Honestly, what film student wouldn’t want to do a King story?