Here are the four personality types psychologists came up with. And by definition, most of us fit into the first one, which they called "Average"
1. Average. You're relatively agreeable, conscientious, extraverted, and neurotic. But you're a little cautious when it comes to trying new things. Apparently that's most of us.
2. Reserved. You're less extraverted, neurotic, and open to new things. But you're still emotionally stable, conscientious, and agreeable.
3. Self-centered. You're VERY extraverted, but score lower in the other four traits. People under 21 are more likely to fit into that one. Especially teenage boys.
4. Role model. You score high in all of the categories except neuroticism. So you're extraverted, open to new experiences, agreeable, and emotionally stable. People over 40 were more likely to fit into that one.