Damn that's super interesting. The test itself is useless, but self-identifying into a the scheme accompanied with the aforementioned useless test helps you find likeminded people. People you allegedly find that you work better with. It's a shame that there is no way to self-identify into anything else, and find like-minded people, without relying on a thoroughly antiquated pseudoscientific bullshit classification system. My point is this: Praising MB for letting you self-categorise into a scheme that, on the surface, generates better team dynamics than no system at all is giving credit to systematising. It is not giving credit to MB. Try this self-categorisation system out, and see if it out-performs no system: knowledgeable / unknowledgeable.