Well, I don't have a favorite per se, but here's one that I liked:

There was once a young man who, in his youth, professed his desire to become a great writer.

When asked to define "great" he said, "I want to write stuff that the whole world will read, stuff that people will react to on a truly emotional level, stuff that will make them scream, cry, howl in pain and anger!"

He now writes error messages for Microsoft Corporation.