I'll go with an option not on the list: "useless", as are the results of all these personality tests. The whole notion that you can absolutely quantify something as nebulous and volatile as personality is absurd; the idea of doing so within the constraint of four axes is down right laughable.
Seriously, these things are the real-life equivalent of a silly Facebook quiz.
edit: Having looked over the questions in the linked quiz, my answer to most all of them was "it depends". I guess this means I have no personality. :)
Seriously, these things are the real-life equivalent of a silly Facebook quiz.
edit: Having looked over the questions in the linked quiz, my answer to most all of them was "it depends". I guess this means I have no personality. :)