These choices are probably going to be unpopular, but keep complaints to yourself:
The Neverending StoryProbably because I didn't read the book and see the movie until I was an adult, but I just couldn't make myself give a shit about anything that was happening in the movie.
I disliked the book because the main character was such an obnoxious little shit for most of it, and just wasn't interested in the movie at all.
Labyrinth is a very similar kind of movie and story but I absolutely loved that. Something about The Neverending Story just rubbed me the wrong way.
I think it just felt too "hippy" to me in its philosophy... "Love Dragon"... gimme a break!
The Dark CrystalIf this had been an animated movie I think I would have loved it.
But I just can't make it more than 20 minutes into this movie before the dead faces of the main puppet characters drive me up the wall.
Puppet shows where the characters only have their body language to express their feelings are fine for 15 minutes, but not for me for a full length movie.