What single book/movie (that you read/watched as a child) do you feel played the most instrumental role in forming you as a person?

Please do NOT list a book/movie you simply liked as a child. It also is NOT sufficient if the book/movie simply enlightened/inspired you.

I am specifically interested in books/movies that played a role in specifically shaping your personality. Please list specific examples from the book/movie that are elements of you today as a result of the book/movie.

[My answer to follow.]