What are you measuring, and why?

Someone who is obsessed with how many grams of protein they consume, how many hours they sleep a night, or how much they can bench press can quickly become annoying — especially when they insist on sharing that information with us.  Broadcasting such information on social networks is even more of a faux-pas (polluting the stream).  I don’t care how many miles you ran this week, and neither does anyone else.

What’s behind our nation’s self-quantification fad — especially among the tech elite?  It’s a combination of: