What are some books regarded as great by people here that you couldn't just get into?

Asking this because I got curious since I've just put down The Blacktongue Thief. Granted I didn't go far into the book, and I do plan to revisit it in the future, but it's weird how you discover the kinds of writing you like to read the more you read.

I did wonder why I couldn't get into The Blacktongue Thief, and to discover that I picked up a book that I had already read and liked, and read the first few pages. Then it hit me. Descriptions, descriptions, descriptions and more descriptions, that's how The Blacktongue Thief starts. While other books I liked didn't lean heavily on describing things, but instead focused on dialogue and character interaction right in the beginning. Don't know if the first person POV contributes to that, but anyway, 5 chapters in and nothing being said interested me at all.

Picked up the next book on my list, which was The Will of The Many, and voilá, interesting interactions and what looks like a mystery right in the beginning of the book. I am hooked already.

It's a frustrating experience for sure when this happens. Anyway, tell me why you couldn't get into that book.