Extrovert vs Introvert People

In many cases, there are two types of people- extroverts and introverts. I think that I'm an Extrovert, because I like to be with people rather than be alone all the time. If everybody in the world was an introvert, I think It'd be pretty quiet. However, if everyone was an extrovert, the world would be really wild and crazy. It's pretty good to have a good combination of both, it keeps everything good; loud and exciting, but also calm and secure. The same goes for your friends; its nice to have some outgoing extrovert friends, but also some calm introvert friends to be serious with. Extrovert leaders are pretty good, in my opinion. They're more up-beat enough to get everybody's attention, and get people to get stuff done, where an introvert leader is more quiet and doesn't communicate as much to the group on the needs to complete a project. It's the same for teachers- its nice to have an outgoing and fun teacher to help make the class more enjoyable.