INTJf reminds me of why J/P is considered a dichotomy. They seem rather rigid on the outside, but I can see the rationale behind it all. (I do believe it's the largest MBTI-related forum; they've adapted to order on a GRAND scale) In my experience, however, INTJf is about as easily rejecting of non-Te material as INTPc is of non-Ti material. Both forums are pretty extreme in how they handle things. INTJf is big on Occam's razor and doesn't appreciate trying to tweak an already functional system, while INTPc is more inclined to believe that if you don't have 3 subtypes, you don't know your type.