I'm not sure how to type this friend of mine. He's an IXTJ I'm pretty sure, just not positive if that X should be an N or an S.
His hobbies seem NT-ish on the whole: computer games, pen and paper RPGs, paintball, fencing, Star Wars, reading science fiction of all kinds. He's also into car tuning and racing. Professionally, he's a computer programmer. Sounds like an NT, right?
On the other hand, abstract kinds of ideas don't appear to engross him nearly as much as they do me. I mean things like psychology, philosophy, MBTI, discussing random hypothetical situations, etc. He'll talk about these kinds of things when I bring them up, but his mind seems to pull more towards the concrete, while I'll continue in an abstract vein indefinitely. Does this sound more like an SJ?
He sounds like an ISTJ to me. I've known plenty of S's that are into computers, sci-fi, and stuff like that. If he is turned off by the hypothetical then I doubt he's INTJ.
Also INTJ's often seem like they are plotting something. Even if they are not malevolent in the slightest, I think people sometimes mistrust them because of the compulsive planning and trying to anticipate the future. If this doesn't sound like your friend then I doubt he's INTJ. From your post he sounds like a bright ISTJ.
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I enjoy philosophy, "random hypothetical situations" and other NT-ish stuff - but not discussing them aloud. I prefer to ponder them in my head. I tend to systematize and internalize different viewpoints rather than argue them out loud like a INTJ does. I tend to incorporate hypothetical ideas into my worldview, think about them for awhile, and then form an opinion. I usually give my only opinion when asked (unless I know you really well - then you can't shut me up). So if he doesn't engage your ideas like another NT would, I'm guessing he's an SJ. Sounds a lot like me.
Well, this appears to be the general consensus. :-) ISTJ. Interesting. Thanks everyone for your help! If more people read this and have other questions or ideas, I shall continue to read with interest.
Is he a dogmatic ISTJ (pretending to be open-minded) or a XSTJ ?
Umm, I don't know that I'd be able to tell (or even understand) the difference between pretending to be open minded and actually being so. For one thing, "open mindedness" is such a vague, highly subjective thing to measure, and for another, pretending to have a particular trait means that at least you see the value in using it and you do so-- is there such a big difference between this and "really" having said trait?
But I digress. Not trying to nit pick here, but this is something I have wondered about recently.
"There ain't no doubt in no one's mind that love's the finest thing around. Whisper something soft and kind." --James Taylor
To me there are two common forms of ISTJs. One is an ISTJ who is moderately introverted and comes off as a traditional, um, traditionalist. The other appears to be a much stronger Introvert (In function mechanics they'd probably have strong Introverted Sensing) to a point where they almost seem to extravert intuition. George Lucas, for instance, fits this profile. Someone who seems very creative and brilliant with technical wizardry, but in many ways seems more like an engineer than a visionary.
So I'd say ISTJ.
"The very existence of flame-throwers proves that some time, somewhere, someone said to themselves, You know, I want to set those people over there on fire, but I'm just not close enough to get the job done."--George Carlin
"There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle." --Albert Einstein