"My passion is to prevent the use of the word "hero" from being dissapated. "hero" should be reserved for anyone who puts their life in danger to save another human being. "hero" is not the local postman that puts in 30 years and retires, nor the local town Little League Coach that has touched so many lives. They are "role models", not "heroes"."
That's on your user page.
I think you'd be interested in the quote at the end of this link.
It has to do with Rick Rescorla, and I think it might help you define a hero further.