Haven't read the entire thread yet, but as a massive Steven King fan AND critic at the same time I have to chime in with my 2 cents before I get sidetracked.
The guy is old. I'm way older then most of the posters on the Farms but let me tell you now, Steven King is fucking OLD now. No writer hits 100% home runs, but his writing over the past 15 years or so has hit a major decline. While he still produces the occasional banger (The Institute I really enjoyed, it was like a follow-up to Firestarter, one of his best early works) most of the content of this period is terrible. Especially his current focus, noir-copycat bullshit. If I never see another 'Mr. Mercedes' universe story it will be too soon. I LOATHE his female dectective character who'se name I don't even remember because the stories sucked such ass. Especially The Outsider.
His earliest works, especially his earliest Richard Bachman works are almost entirely his best. It's a shame 'Rage' has been cancelled both by the literary world and himself. It's understandable in the current world of school shootings, possibly the most dispicable trend that has ruined the education process for the last couple generation of kids but the story itself is fucking gripping, even if it's a shitty excuse for what the protag does. I cannot believe 'The Long Walk' hasn't been made into a movie yet, imo it was far more ripe for a movie then many other early works that got one.
His cocaine and booze era produced his absolute best long form work imo: Firestarter, It, Misery, Tommyknockers, The Stand, Christine, Needful Things, The Drawing of The Three, fucking knockouts and I know I am missing several.
Later Bachman, not near as good. Desperation/Regulators were both terrible misuses of a pretty good concept with 'tak' and the Unformed. Cell felt very 'by the numbers' like the Family Guy parody with Steve and his publisher: 'next book is gonna be about a....' (looks around the office and grabs a desk lamp) 'a haunted LAMP monster! raaar! raar!' Those books around this period were either fluff like that or else preachy fem-works of which only Lisey's Story was any good. Booya Moon reminds me of Clive Barker's dream sea, Quiddity.
The Dark Tower.....hoo boy. What a rollercoaster of awesome to suck and back again and again and again. The first book, raw, stark and fascinating. The second, a fucking MONSTER of a book that got me incredibly hyped for the series, I couldn't wait as a teenager until The Waste Lands came out which was imo the best book of the entire series. It was after this that King really started blovaiting and introducing retarded word salad that sounded like a Vietnamese takeout menu most of the time, and mixed compelling concepts and stories with...I don't even know how to say it but he ruined the series when he fucking wrote himself into it. If it was JUST the accident that near killed him and it was barely touched on, it might have been acceptable. But he turned himself into a LITERAL Deus Ex Machina and....fuck. Book 7 was excellent UNTIL it came to the final battle with The Crimson King. I cannot believe his editors or his own consience let him get that through.
I'll spew more about his short work (which is consistantly MUCH better then his long form work) and touch on shit I didn't rant about here later. but to conclude, his worst work?
Gerald's Game.