Ah, yes. I am quite familiar with this. They had us do a test like this in high school, don't remember the outcome though. I also know some people who are into it and put their type on their profiles and stuff. I think of it along the same lines as horoscopes, tarot reading or cold reading. Broad strokes to get things to fit well enough, often rewording traits to sound different for other types, etc.
Anyway! Sorry, I'm not trying to shit on your topic. I think it's an entertaining thing to do. Taking online tests are a guilty pleasure of mine. :> I am ISFP, the Adventurer!