Read quite a few King works over the years. The following are my favorites in no particular order:
The Dark Tower series (with the least favorite being Wizard and Glass and the best a tossup between The Drawing of the Three and Wastelands)
Rita Hayworth and Shawshank Redemption
The Stand (peters out towards the end but an epic read)
The Dead Zone
The Long Walk (as Richard Bachman)
Just finished Four Past Midnight which was OK and the novella that was adapted into the mini series the Langoliers was one of his lesser works in the collection (the best one surprisingly given its title was the Library Policeman) and I was given Under the Dome for Christmas. Can't wait to get started on it!
Under the Dome is a great read, and surprisingly different for Stephen King. It's less horror and more political commentary. It's clear that, when he wrote it, he was disgustingly sick of right-wing American politics. If you're more left-ish, you'll find the book amazingly apt.