The Princess Bride
I feel like movies like Princess Bride, Scream, or Galaxy Quest, that are made as love letters to a specific genre of film, are either some of the best or some of the worst films out there. The biggest determining factor being whether the director actually loves the genre. To me, I feel like Rob Reiners love for adventure/fantasy is very evident, which is why this film works to the scale that it does. Obviously this film is very nostalgic as well, but I do think that there is more to it than that. I think it encapsulates perfectly what a good story is.