It, Salem's Lot & The Stand are my favorites. Also liked Needful Things, Thinner, etc. A lot of them are good but not great. I wanted to like the Dark Tower series because I liked everything about the idea, but it just never caught my attention like I hoped it would. Might have to go back and try again.
I was able to select a free book at an event a year and a half ago. I selected King's novel
The Outsider. I was about a third of the way into it and I thought, "Wow, this is a departure for King - no supernatural, no monsters - just a story about how violent crime tears apart people and communities. I guess he's done some of that non-horror like
The Body and
Rita Hayworth and the Shawshank Redemption." Well...then Stephen King happened....
My favorites? Well,
The Stand and
Salem's Lot are the only ones I have read more than once. I'll probably read
The Green Mile again at some point. Mrs. Velo and I bought those as they came out in serial form and read them to each other. It was kind of a cool way to enjoy it together.