Meditation and movies
Yeah, I have some of that same problem with movies and novels.

However, movies and books don't have to be unpredictable in order to be powerful, I don't think. I frequently enjoy watching movies, and reading books, that I have previously read or watched. Familiarity allows the mind to wander as it passes through the story - and I value particular books and movies for repetition because the place where they send my wandering thoughts is rich.

I think it dovetails with what types of movies you like. I loved "Stalker" by Tarkovsky, by I have a friend who was angry at me for several months for talking up how much I loved it an watching it with him. He thought it was intensely boring, and said he only kept watching it, "waiting for all the good stuff to happen," I'd told him about. Whereas I loved it because as it slowly panned over a stream bottom strewn with bottletops, toys, gears, and other detritus of life, my mind wandered to sad and marvelous places.