Who's Riding the Social Media Train?

I've spent a good deal of time studying personality communication and even more time field testing.  But, this social media movement presents a new and interesting observation in personality types and communication. Technology obviously powers the social media engine, but who's really riding the train? Are its passengers simply younger generations? Not totally, or I wouldn't be here. Do certain personality types trend up in social media more than others? Are social mediums a fad or fixture? Is communication really improved or possibly hindered by these outlets? I have my opinions, but as I've always said in my seminars "successful communication is not about me." It's about you. So, what are your thoughts?