Being happy can no doubt make day-to-day life easier than constantly going about life in a funk, but there is no evidence suggesting that happiness -- especially feigned happiness -- contributes in any real way to health and well-being.
Why do some people embark on a news hunt the moment they open their eyelids in the morning, while others get the news only if it eventually gets them, when it dons the front page of virtually every media outlet available?
For extroverts, we'd almost rather be dead than feel alone and irrelevant. This is why we're so driven to be in the spotlight. Nobody would think to look for insecurity in the ones who seem to be running the show.
My initial hypothesis was that talkers are socially conditioned. The 'talking gene' must be related to other traits like aggressiveness, openness, and friendliness; and that this is contingent upon a child's behavior.