I talked with my mom recently. She had gone to something and learned about the Enneagram personality thing. I hadn't heard of it before, but I'm fascinated by personality tests.
One interesting tidbit from this system is that it tries to predict what people of various personalities will do when they are in a good place or in a bad place. I identify most with the investigator personality type, and it predicts that when I'm in a bad place, I will retreat socially. Which I do.. and have been doing recently, since I have been depressed.