Yea, I finished Kingdom Hospital last week or the week before and was pretty underwhelmed by it. It had it's good parts, and it was certainly better than Sleepwalkers, Rose Red & Storm of the Century (I haven't seen Golden Years), but it still wasn't all that great, I didn't think. Oh, and I haven't seen Chinga yet either....I guess that should count as an original teleplay from Mr. King too.
I don't really care for his other adaptations either, like his version of The Shining or The Stand or Maximum Overdrive or Silver Bullet, though I loved the books those are based off. I'll admit to liking his adaptation of Pet Semetary (it was really one of the first horror movies I'd ever seen as a little kid and it scared the crap out of me....I must've been maybe 9 or 10 years old at the time) but that's really about the only one and watching it now it is a bit cheesy. I sort of think he should just stick with keeping his stories on paper and let someone else adapt them for the screen (only, you know, someone good...).