1. Doesn't define you.
  2. Doesn't do a particularly good job of describing people.
  3. Was invented by, more or less a nutcase.
  4. Does not match any historical figures, because they never took the test, because it didn't exist at the time.
  5. I don't want to begrudge anyone any amount of joy or personal discovery, but personality tests are glorified horoscopes and the Meyers-Briggs organization especially is a little Cultish for my taste.