Extraversion and social skills, basically. You can learn better social skills. Some people have a natural talent for it, true, but they're usually people who deeply enjoy being around people all the time. And not just being around people, but also entertaining them. Consequently, their social skills improve greatly over time simply because they get a lot of practice.

As a trade-off, people who are that extraverted constantly need to be around people. I had a friend who would come to work sometimes 3 hours early and sit in the break room because he didn't like being at his apartment alone.