If you haven't tried out the Klout service, I recommend that you try it.
It does a good job of showing your "influence" to other users a across the net. Whether your favorite social media is Twitter, Linkedin, G+, Facebook, etc.
Also, if you need to stroke your ego, or have a narcissistic side it can make boost your own feeling of self importance (or lack their of). Either way, I find it helpful to see how many people I potentially influence, and have it visualized in graphs.