My best friend Penny is an introvert. This is a good thing, because I am an extrovert so we balance one another nicely. Penny knows me very well; and understands my tendency to talk on and on about things in my life. She listens well and offers good feedback. We’ve known one another for over 50 years, and Penny recognizes all of the nuances in my voice and all my pet phrases and expressions. I’ve learned how to draw Penny out and get…