Honestly, I feel a bit changed after most good movies. The ones that come to mind:
1. The Natural – The first film I learned what the director really does, translating from script to screen. Opened my eyes to filmmaking and got me interested. Changed my career trajectory you could say.
2. Several films taught me to look at fate/coincidence differently – Red (1994), Signs, The Truman Show, Donnie Darko
3. As a kid, The Wizard of Oz and Singing in the Rain taught me to dream.
4. 12 Years a Slave has really impacted my adulthood in ways that are difficult to explain, but essentially by challenging my view that even in the greatest tragedy, life is worth living and there can be goodness. It showed the audience true evil and lives that were only filled with torture and despair.