The first Stephen King novel I read (well, listened to) was "Under the Dome" which wasn't bad at all. Thinking we'd found a new author to take up our commuting time, I looked up his other books and thought "The Dark Tower" series sounded interesting, so we then listened to "The Gunslinger".
It was miserable. We stuck with it to the end, because the series is quite popular and surely it had to get better! But no.

It was a relief when we finally got to the end of the book. A few months later we decided to have a go at the sequel- and I didn't get through the first hour. Yuck. Just yuck. I know King is known for horror, but I really couldn't make myself continue that one.
I know a lot of people are fanatical in their admiration of "The Dark Tower", but the first book turned me off of King's work for good, I think.
I don't like stories that are like a bad dream, and that's what that one reminded me of.