Hey Ceecee,
I am personally an INTP by the MBTI. I think that the two important characteristics out of that group would be the thinking and intuitive portions acting in concert. The intuitive section is needes to take in the data on peak oil and see its net effect on our entire set of systems. It is easy for an intuitive person to see the ripple effect of peak as they think of things in terms of interconnected systems. The intuitive lives in the future, and can easily extrapolate from fractured and incomplete data which is mostly what we have at this point.
A sensing person lives in the present and makes decisions based on past experiences. In a sensing persons world, oil has been cheap, is cheap, and will always be cheap. And since the data about reserves and such varies so wildly, they can't take anything about peak oil serious as this contradicts their hard facts prerequisite.
The thinking part is needed for the next part of the process after we have initially grasped peak oil but need to prove the consequences to ourselves in a concrete manner. A thinking person is able to go through all the data no matter what the shock value and put all the data into perspective to gain a total view. A strong feeling individual, even though he may have the intuitive knowledge, has a hard time accepting the emotional realities that such a theory entails. Basically their feeling shut down their faculties when the consequences dawn and they shove away the thought of that reality as it is anathma to their personal world view. Feeling individuals have a very strong aversion to conflict and peak oil sets up several internal conflicts(Im contributing, my lifestyle is dangerous,but Im a caring person and would never hurt someone, etc) and thoughts of societal conflicts with all they know being put in jeopardy( wars, changing social structures, alienation from the *norm*if they accept peak oil views; *being accepted by the norm is very important for feeling people, they need to be accepted to feel whole or gain emotional energy*).
These two are, in my opinion, the more important of the four. I mean, being introverted will make you more likely to stumble onto the theory

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*Pan to webcam showing archaen in a dark room surrounded by three computers, a fridge full of soda, and thirty tabs open on his firefox browser* as compared to joe outgoing guy who is out at the bar/pool hall/whatever most of the time and not surfing slashdot posts at 3 in the morning and stumbling across matt's site.
But it should not really affect comprehension or intellectual conclusion of the person presented with peak oil.
As for the judging/percieving portion, I belieive this is your method of planning based on your analysis. This is more in the realm how you react after you have made a decision about information, rather than being in the process of digesting information.
This is all conjecture BTW, I am a chemical engineer in training, not a psychologist. So, if I have any gaping holes in my analysis or you guys have a better theory, feel free to tear me to shreds

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