Stephen King is one of my all time favourite writers however some of his books I just couldn't get into. He writes a wide variety so if you try one of his books and don't like it, don't assume that you won't like any of his books.
My favourites: Misery, The Shining, Dolores Claiborne, The Dark Half, The Langoliers (novella - I think it was in "four past midnight" but I no longer have the book so I can't check, it was one of his books of novellas.)
On my "want to read" list: 11/22/63
Recently read: The Mr Mercedes series (Mr Mercedes, Finders Keepers and End of Watch) - the first two are different to his other works as in they're more detective novels than horror (with horror scenes, but the real world not the supernatural kind), while the 3rd is more like your traditional horror. (Yep genre shift mid series... I think King tried break as many of these "rules" that get trotted out to new writers as he could with this series.)
Currently Reading: Dr Sleep. Sequel to The Shining many years later and the MC is Danny (the little boy) as a grown man. The story's different enough from The Shining that I'd recommend someone reading it even if they didn't particularly like The Shining.
The ones I couldn't get into I might try reading again at some point, as tastes change as you get older. I'm also probably going to see the film IT even though I couldn't get into the book, for the simple fact that I thought that the book of The Shining was great but didn't like the film much (didn't like that they killed off Dick Hallorann - comes across as typical Hollywood racism, seeing as he was essential in the book and killing him off at the point he was killed off pretty much made the entire character pointless. Plus I was just generally expecting it to be more like the book) so it can happen the other way around, right?