@JDragon
In no particular order of preference, my favorites list includes but is not limited to:
-The Running Man: Most satisfying end sequence of any King book imo. Ignore the movie.
-The Talisman/Black House: He co-wrote these with Peter Straub, and they are excellent. I think The Talisman is one of his best books. These take place more directly in relation to the Gunslinger universe backdrop that gradually filtered into so many of his novels, even if they aren't technically part of the series.
-The Green Mile: Very well written. Very sad.
-Desperation/The Regulators: Pretty well encapsulates 90's King. I always liked what he did here; each book has the same characters, and the same monster, but the context and story are different. Sort of an alternate reality kind of thing, but not really. You just have to read them to understand. Desperation is the better of the two books.
-Insomnia: Another solid King universe book. I always liked the main character.
-The Shining/Doctor Sleep: Now, I know that a lot has been said about The Shining, but it really is an outstanding book imo. People always talk about King as a master of horror, but interestingly enough I always felt like much of what he wrote was not in line with typical horror notions. The Shining, however, is a straight up spooky ghost story and a damn good one at that. The sequel, Doctor Sleep, came out just a few years ago and follows the main character from the Shining aged up in real time. I never expected a sequel to The Shining, but it's great.
-The Girl Who Loved Tom Gordon: Story about a little girl that gets lost in the woods. One of my favorites.
Short story and novella collections:
-Skeleton Crew: Again, has a bunch of awesome stuff in there.
-Different seasons: Has "The Body", which was turned into the film "Stand By Me". Good example of top form King imo
-Nightmares and Dreamscapes: Among other great stories, such as "Chattery Teeth", this collection has one called "The Moving Finger" that i've re-read several times throughout my life. Overall, this collection probably has the largest number of short stories that I
don't re-read, but the good ones are really really good.
-Everything's Eventual: There's a story in this one called "All That You Love Will Be Carried Away" that I often recommend.
Honestly, you should just read all his short story and novella collections.