I remember a thread where ENTJ-ENFP -relationships were being discussed, and Cloud asked why same kinds of relationships were not suggested for ENFJ-ENTP, or other similar kinds of pairings. First I thought there might be a same kind of relation, but then - why?
Why can't there be irregularities within the system? People of all the types live in a society that is far from regular or symmetrical. As an obvious fact, functions do not define all our behavior.
Take people's first function as an example. In the ENTJ, the Te manifests itself by making them understand what anyone can and can not do, so that they tend to avoid infeasible tasks more so than most other types. A young ENTJ may butt heads to any obstacle, trying to do all they can, only falling back to less aggressively direct behavior if their previous approach has not worked. Hence, they may eventually be interested of almost any kind of action that seems productive at the moment, may it be in the area of traditional Fe, Ti, Si behaviors, or those of any other function. With this type, planning and strategy is of course preferred over compassion and moods.
So, depending on cultural surroundings, what works, what is being appreciated and what gives a greater status, the ENTJ might be attracted to the scientific thoughts of an INTP, or the glamorous showmanship of an ENFP or ESTP.
INTP again is ever interested of understanding the world, analyzing and disseminating information, and adaptive behavior comes only after having analyzed it as a correct solution to the Equation of Life.
Surely many aspects in the world force us out of the comfortable and regular ways of the MBTI.