I've quoted Guy Kawasaki before to explain the differences I see between places like Facebook and Twitter and Google+, but this article really focused on the Google+ microcosm and nicely explains why I continue to find it the best fit for me for almost everything I do with social media.
Why Google+ is the place for passions
The single biggest controversy about social media is whetherGoogle+ is a dying wasteland of non-activity or a hive of conversation and engagement. Mike Elgan is here to explain why it’s the latter.