I've noticed two types of introverts: easy-going ones and curmudgeony ones. Likewise, I've noticed two types of extroverts: excited extroverts and unhappy ones.

I've noticed two types of introverts: easy-going ones and curmudgeony ones. Likewise, I've noticed two types of extroverts: excited extroverts and unhappy ones. This is still a gross simplification, but it makes it easier to think about people's perspectives..