What Makes a Movie Truly Memorable?

Some movies are entertaining while you're watching them, but you forget about them a few days later. Then some movies stay with you for years. You remember the characters, certain scenes, the soundtrack, or even how you felt the first time you watched them. Everyone seems to have that one movie they can watch repeatedly without getting tired of it. What do you think makes a movie truly memorable: the story, characters, emotions, performances, or something else?