I don't know if I agree. I'm not sure who I ever was. as I was born into this, and what I would have been in the abscence of the brainwashing and abuse. Becca can you tell me by reading some of my posts which one you think I am. I didn't even know of these types. Another question... If you are evil at your core are you saying that this will never change no matter what you do?
Tyrone it's important to point out that, according to the MBTI, there are sixteen recognized grids of personality, some combination or other using the letters E or I, N or S, F or P, and F or J.
There is a separate consideration to all this, which might be what you are alluding to: Each individual, besides having their own MBTI designation, will also fall somewhere along a broad continuum: That which goes between HEALTHY vs. UNHEALTHY. Each personality will manifest their signs of health (or UNhealth) in a fairly predictable manner, according to their type, but the DEGREE to which they do so will depend on where they fall on this second scale.
This is where personality disorders come in. I actually plan to get a psych degree studying this very thing. I find it very fascinating to look at human nature in all its wondrous and even convoluted forms.