Extroverts tend to be more personal when talking..or that after, say, five minutes of talking to them after you've met them you know that they have two kids, are working 3 jobs, their dog died yesterday, and that they just got over the flu..and I'm not saying all extroverts do this, but this is a black and white definition between introverts, and extroverts...just take Jerry Seinfeld for instance..very strong introvert, really, but he was a stand-up comedian that could talk and talk..so it's not how much you talk, necessarily, (although it does play a part), but what you choose to talk about..