Think about it. I could name a few. I just watched Into the Wild (twice).
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But we rarely see what life is like for the protagonist after the journey. After ordinary becomes ruined. Are we to believe they lived content after such adventures?
Tolkein probably had it right when Frodo suffered in the Shire from wounds received in the journey and the feeling of being out of place until setting off on the sea.
What about the character that left, accomplished, and suffers? Where is the movie about him?