Introvert or Extrovert

Not to bite off of Nonsociety's links but found this article about introverts and extroverts interesting. Despite my tendency to tell the world my life story, I'm somewhat of an introvert at times. The thought of spending all day with people scares me but then again I'm not constantly connected through my phone, twitter, etc. I've never found myself to be boring and in fact, would rather do something by myself than someone I don't 100% click with. Food for though. Introvert or extrovert?