Misery will probably always be my favorite. One of my all-time favorite performances in any movie, James Caan. Not to mention Bates, of course. sK's story is told as intact as in any adaption I can think of. A beautiful work of art, imho.
Shawshank Redemption, Misery, The Green Mile, Carrie, Cujo, Creepshow, Apt Pupil, The Shining, Stand By Me, Silver Bullit are amongst my faves.
My list is almost the same as yours John: Creepshow, The Green Mile, Misery, Pet Sematary, The Shining, Carrie, and Shawshank Redemption. If I had to pick one, I'd probably go with the Shining, even though the end is different than the book.
As for the worst: The Mangler, Maximum Overdrive (although a great soundtrack from AC/DC), and the completely butchered "Lawnmower Man". Great short story that turned into a bad movie. I'd say Stand By Me is the rare movie that might be better than the book. The actors and director really made that story come to life.
Hearts In Atlantis (watched it again last night so I had to add it to the list!)
(in that order, which might change except for Shawshank being #1) =D
I have always had a soft spot for IT, even though there is a ton of stuff removed, and the adult actors are not exactly ........ well, good (except for the guy who played Mike). Plus the fact that Bill had a pony tail instead of being mostly bald, and Audra was Asian instead of Scandenavian, and it was all a bit cheesy, but I still watch it when it's on, and I credit IT for me even reading any SK books.
In terms of a good film, then it is probably going to be the green mile, the acting in that was just all round fantastic, even the 2 most hated people in the film - Wild Bill and Percy - were acted so well that it gave you extra hate towards them, especially Doug Hutchison as Percy. Tom Hanks' performance is just brilliant, as was the late Micheal Clarke Duncan's.
Close 2nd is Stand By Me, it is a film from my childhood, and provides a nice sense of nostalgia as well as being a well written and well acted film.
I think the Shining gets a rough deal around here, and I feel some people are subconciously blinded by Stephen's comments on it and thier loyalty to him. OK, so it was different from the book, and Jacks descent into madness was too quick when compared to the book, but it is still a great film which I feel was only let down by Shelly's bad acting as Wendy. As for the mini series, yes it was closer to the book but the acting is horrendous (except for that weird guy who played the band conductor :) ). Jack Nicholson is amazing in the film, and the use of the song 'Midnight, the stars and you' by Al Bowly and Ray Nouble just fitted in perfectly. That was Tarentino esque musical pairing.
The Shining...no contest, for me.
The Mist, Shawshank and The Green Mile