People who don't know each other well almost exclusively talk about things that don't matter, I don't see how that's negative at all. Also this whole introvert/extrovert dichotomy is a massive oversimplification of how people behave and interact. I legitimately don't fit in either of your descriptions, so I know for a fact they don't cover all the bases. As far as I can tell, I'm just a vert. I lose energy by expending it and I gain energy by comsuming it. Also sleep and sunlight help.