Personality testing is a booming business; inevitably, there’s a business to build on top of the results. Classifying things, or in this case, people is a step in a series that ultimately leads to the creation of personalized products, services, supplements, etc., based on determined personality.

I’ll cop to taking several of them over the years. I find that Enneagram feels the most accurate, though not without some things that simply are not accurate.