I once took a similar, but much simpler test consisting of choleric, melancholic, sanguine and phlegmatic, and scored near evenly in each category.

I was told that it was because I was a super-rare type of person, who was essentially capable of exhibiting whichever type of personality suited me at the time.

I think it was because I gamed the test.

While I can see the value in attempting to define the traits of certain people, I don't think that a set 4, 16, or even 200 categories will help you understand someone as well as spending a week with them will.