I've always been fascinated by human behavior and why people say and do the things they do. Perception is the keyword when it comes to personality types. Not 16 types (MBTI) or 9 (Enneagram). The most viable, useful theory is the Wakefield Doctrine. With an understanding of the three personality types you will you finally be able to understand why people say/do the things they do. Behavior will finally make sense.
Oh by the way, I'm a scott. Explains a lot... Yes, if you don't know by now the characteristic traits of scotts you'll have to go to the link http://wakefielddoctrine.com/scotts/