Most of King's books don't scare me. I read his books because he is an awesome story-teller.

There are one or two that have put a bit of fright into me, but i have read every single one of his novels and many of them several times. Beyond King, I don't read much in the way of horror books. He sucked me in early when I was in my teens. Mostly I read fantasy, thrillers, some sci-fi, etc. And yeah I even read On Writing, which is extremely interesting in its own right.
If you read King's horror novels but haven't read the Dark Tower series, you are missing out. He has tied all of his "worlds" together via the Dark Tower Series and a couple of books he co-wrote with Peter Straub.
Vaping Kelli's Cinnamon Roll (Cinnabun) today. as usual. With some Custard's Last Stand thrown in for good measure. When I finish CLS I think I will load a tank of Clove (MBV) in its place to give that a go as it has been sitting for a few weeks now.