On the one hand, its development was rather checkered. On the other, I have found it useful.
I had a boss who kept trying to change me in some kind of vague way. At one point, it occurred to me that he was trying to change my personality. Guessing him to be an ISTJ on the Myers-Briggs, I got a description for his personality and since I am an ENFP, I got a description for mine.
I approached him and said that I was going to hand him a description of his personality type. He read it and he said, “so?” Then I handed him the ENFP description and told him it was mine. As he read it, he said, “This is what I was afraid of. It’s your personality.” He never tried to change me again.
©2016 Stephen L. Martin
Painting: title unknown by Antonio Diego Voci