One of my favorite details about Neal Stephenson's "Snow Crash" is the name he chose for his main character: Hiro Protagonist. It's not just a lovely bit of wordplay, it immediately makes you think about whether the protagonist is a "hero" or not.

This overloaded meaning of the word "hero" is especially pertinent when discussing the differences between the interpretation of "hero" in US culture and other cultures. Outside overt dictatorships, the US is the only country I know of where people are taught that anyone who serves or served in the military is automatically a "hero", regardless of whether they've actually done anything that would normally be considered heroic.