I've been testing out this personality chart on various people, and it seems like almost everybody can be fairly accurately described through the use of one of the 16 personality types that can be gained from this exercise.
Above is a link for a simple test to determine which of the 16 you are. It's only 4 questions long, so it's important to deeply consider your answer to each of these to help your result be as accurate to your personality as possible.
Once you've answered all 4 questions, you will be able to see a 4-letter code. This code can be used in the link below to see what sort of personality you could be described as!
I think it would be really interesting to see what different types we have on VGChartz, or whether gamers are more likely to be one particular type over another. If we get enough responses I may even put a table in the OP!
Of course, don't feel obliged to post your personality type if you feel it's too personal :) For the record, I got an ISTJ - looking forward to seeing what types of people we have on the 'Chartz!