Except for revisiting The Shining recently, I haven't read any of the classic Stephen King's in a long time. Not sure how I'd like them today. I'm not sure if it just started happening at some specific point (when he became too famous for an editor?) or if I was just too young to notice when I first started reading his older stuff, but while I'm generally a huge fan of the beginning and middle of his books, they get very meh on the ends when they get to the point where he really obviously had no idea where he was going with them any more, but needed to wrap them up somehow.
If you've read his On Writing, he makes it a point that he never plans or writes outlines, and when you sit down and read the books it becomes clear the times that works out for him and the times it...really doesn't.
Cell was one of the worst examples of an otherwise great story unraveling at the end I'd ever read. (Note I've only read a couple of the Dark Tower books, though from what I've heard it's a good thing I dropped them early...)
Though of his more recent work, I did like both Duma Key and Mr. Mercedes.
I have more favorites among his short stories than the actual novels. They can be hit and miss, but when they hit, holy shit. There's some I read years and years ago that had an impact that's stuck with me to this day.