I am an INTJ (moderate on every axis), which probably surprises no one. This is the type that gets called "Mastermind".
But I was surprised and amused by how much the two writeups pegged me to a T.
Particularly apt phrases from Keirsey's description::
"They are the people who formulate coherent and comprehensive contingency plans."
"INTJs are natural brainstormers, always open to new concepts and, in fact, aggressively seeking them."
From the INTJ type description by J. Butt and M.M. Heiss:
"INTJs have also been known to take it upon themselves to implement critical decisions without consulting their supervisors or co-workers."
"many also find it useful to learn to simulate some degree of surface conformism in order to mask their inherent unconventionality."
And especially this one:
"Perhaps the most fundamental problem, however, is that INTJs really want people to make sense."
Oh my, this is so dead accurate about my problems with the world as a whole.