Another thing: the Myers-Briggs Type Indicator is based on, and inspired by, the work done on this by Carl Jung. His interest was firstly to try to find explanations for the differences in behaviour of different people. It was also part of his entire life's work which was aimed at providing a framework in which people could reach their ultimate potential: to help people to become the person they were "intended" to be.

So he definitely wouldn't go along with people using his personality types to box people in and limit them. In fact, part of his thesis was that as we mature in life (if we really are maturing and not just getting older), we take on more and more of our undeveloped characteristics. In particular, as an INTJ, I should find that the E, S, F and P aspects of my personality (which are the relatively undeveloped bits) will become more prominent.

Another personality typing instrument, the Enneagram, also has as its aim the growth of the individual into a more rounded personality. I heard it once said, "The Enneagram doesn't put you in a box, it shows you the box you've always been in, and gives you a way to get out". I think the same would apply to Jung/Myers-Briggs.