How do you interact with people of the various temperaments? Me:
IJs: I tend to find it easy to see where such people are coming from when the have a certain view or act a certain way, even if I fundamentally disagree with them. This means I am able to defend them accordingly against a common foe or intruding position. I see such people as stable and controlled. If they lose their temper, it is easily fathomable: even if I do not know how to handle it, I know they will go back to essentially how they were after a somewhat predictable amount of time and ranting. In relationships (between me as an IJ and them), it can result in a lifetime of mutual shared tedium. Each individual may be essentially self-efficient and thus contained. One individual may be more practical than the other but there is an apparent lack of a strong exerting force that gives the impression that a slow managed decline is taking place.
IPs: These individuals have certain qualities that I lack and have a somewhat different rhythm to my own which has an appeal. There is a certain supplementing vigour they give to me in the day-to-day. There is also a new appreciation for common interests we hold in common, as well as the introduction to new fields previously outside of my scope of interest. They often seem to have a certain quiet scholarly demeanour to them, or otherwise appear as some form of tranquil observer. Misunderstandings can happen, perhaps because of two not quite compatible temperaments approaching things from different ends or because each temperament has a somewhat different sense of timing (e.g. when I have a long term project in mind, I do things in a distinct order at the cost of things I consider less important, that to others may seem too out-of-step and with me too unwilling to change to certain key events). I think in the long-term, relationships with such individuals tend to burn out due to a lack of immediacy that each individual requires as a supplement.
EPs: I tend to find them too unpredictable with little to show for it. They tend to be impulsive in the sense that they appear to do things on occasion without rhyme or reason, or at least, not in a steady or predictable way. This means at the worst, they can seem dangerous, or otherwise just inopportune. These traits can seem admirable if they demonstrate they are highly competent in whatever area, or if they are able to energetic get things done over an extended period of time. Often however, their actions can seem a little too obvious and with the subtlety of a rhinoceros. This often leads to an internal or external shrugging of shoulders and the inability to explain quite how their approach is incorrect, especially if it has worked spectacularly. They often have a way of saying things that seem utterly ill-considered and unpolished which tends to take an inordinate amount of time to deconstruct and correct, partly due to the way such conversations tend to go with them (This is probably more of an issue with extroverts in general, especially unfavourable relations: with Mirror types and individuals this is probably less the case). I think in friendships with such types, any dialogue is taking much more in earnest and the IJ and EP type perhaps consider each other a guardian angel in different spheres. In such cases, the other provides a primer on their dealings and perhaps making them more cautious or explanatory accordingly. When such friendships break up, the results can be pretty devastating however (each individual in such a case knows the former friend's process of thought and knows their weaknesses. I don't think there are many things worse than having someone align against you feeling as if they know you entirely you as a person). I think in long-term relationships with such types, being in a long-term relationship is quite telling because if two people from the two temperaments don't like each other fairly immediately, they are unlikely to ever do so. In the long-term, the two individuals are highly liable to tire of each other and drift apart, although they may end up as mere acquaintances or as hanger-ons.
EJs: These people have a very strong zest that is immediately attractive. They are invariably proactive, or otherwise, they are likely to be reinvigorated when near an IJ. To me, they seem very majestical, almost impossible. I tend to I feel like a placeholder or anchor around them (I don't mean in the manner of St. Clement): I find it naturally easy to be fairly stable and consistently reliable, I am able to collate pieces of information and give my thoughts on various subjects. If there is any negative interaction with a newly encountered EJ, it is likely that we will both move apart almost immediately with a minimal amount of fuss and not encounter each other again (EJs seem to move on from thing to thing like that). Each of them is able to actively contribute to my own private thoughts and perhaps something interesting happens as a result, or at least we are each able to provide direction for each other.