It is not a popular opinion, but it is one that I've held for as long as I've seriously studied and written about horror. I believe that Stephen King is at his best in the short story format. The longer he writes a narrative, the more convoluted it becomes. His short stories, as strange as some of them are, focus on singular ideas and tell them well. The novels and even the novellas tend to derail themselves with more and more ideas until the ending bears little resemblance to the beginning.
1922 is one of the more interesting cases that teeters on the edge of changing my mind. Originally published as part of Full Dark, No Stars (an anthology of novellas), I found the novella to be an interesting mix of references to horror literature as a whole. There's a clear borrowed throughline from Edgar Allan Poe's "The Black Cat"--a mischief of rats replace the cat, but they prove just as immortal. He also riffs on small town murder and shockingly organized crime. The latter tends to stick to his short stories ("The Death of Jack Hamilton" is one of his best), but the former has received many cinematic adaptations--Misery, Secret Window, Delores Claiborne, and more.