ATTQOTD: I manage social media for a living, so yeah... I totally overshare.

I probably share 65-70% of my runs on Facebook - I usually have a pretty pic from the route or something interesting that happened, or just a funny quip about running in general to share. A large portion of my Friends run, too, so we often converse about runs via Facebook. My view is that I post things on my page that I'd share with people in face-to-face conversation. Folks are welcome to Unfollow or Unfriend me if they don't like seeing what I post.