Fight Club. It wasn’t fun to read it felt like the author was ploying with me trying purposefully to confuse me to a point where it forced me to become disinterested. However with the movie i was captivated every second. The book’s attempt to obscure and mystify the reader might have been an intentional stylistic choice, but for me, it didn’t translate well.
Possibly controversial but I like the movie of The Princess Bride much better than the book. The book felt kind of cynical in its humor and had some not great men describing women moments. The movie is almost more pure, like it feels like an expression of joy and laughter.