GenX is arguably the first one to show compassion as a generation. Previous generations were about getting theirs, conforming, or dealing with war. GenX is the first one to consciously reject parts of popular culture, the first to become aware of (i.e. the knowledge went beyond scientists) larger issues and care about them beyond how it affected us directly -- we cared and fought about AIDS, pollution, whales, Mexican immigrants, gay rights, non-traditional families, etc.
We were the first ones with extreme forms of music save for a few exceptions like Black Sabbath which were earlier. But we made all the really hardcore forms of everything, punk, metal, techno, etc.
We're the ones who took computer technology from esoteric to everyday and actually knows how it works. People talk about how younger generations are the computer literate ones, but in actuality except for the Linux nerds they are only literate in UIs for apps.