ENTP friend: entertaining for those willing. Only really seems to be driven by necessity and vague sense of conscience. Many actions seem compensatory, as though every effort is made to escape the confines of inadequacy unless there is a mutual sense of absolute approval. Achieving that may mean you'll get put on the backburner though, and if you become exhausted by ENTP, there will be a vague, open-ended sense of closure about the closeness. Fun and enthusiastic but also obnoxious, overbearing, and talks to talk. Infers many things, some of which are off-base, which is served by a nearly unmovable set of seemingly arbitrary principles, but is correct in many ways. Having an ENTP as a distant friend can be like peeling an infinite onion. Getting closer tends to be met with much strategical resistance, and getting closest means you may be treated like gold, even though not necessarily viewed as inherently golden.
INTP friend: Standoffish. Closeness seems to be developed by some sort of untold sense of trust and respect. Really enjoys opening up about area of expertise, and gregariousness tends to shine in an environment in which that expertise thrives. Rather condescending, which seems to be a response in reservation, and not deliberate offense. Comfortable and not easily stressed by academics or intellectual challenge; seems to exert only a small amount of effort to accomplish calm progression. Seems to exert himself even less than ENTP; ENTP exerts himself in an effort to deny distractions. Extremely deterred by random shit he doesn't understand. Getting close means being offered esoteric, but adored information nobody can use unless they are the protagonist in a video game.
INTJ friend: Focused on long term success with incremental measures taken in the present to ensure that success. Challenging and idiosyncratic. Always willing to debate, publicly, privately, anywhere. Mercilessly critical of what seems unreasonable, as opposed to the INTP's tendency to mentally withdraw and rethink things. However, this particular person seemed to be only mildly concerned with the value of intellect and more concerned with the value of personal success and satisfaction. Easily disarmed (at least by me) from an angle of twisted or absurd humor, which makes the "close zone" accessible. Has some trouble empathizing as well as most people, preferring to either distance himself or admit others based on honor system. Getting close means being offered professional or financial advice with implicit care. Seems to subconsciously motor about with eyes that seem to scan along branches of his direction in life.
ENTJ friend: Didn't get to know her very well, but every action was meant for a particular reaction. Even more ambitious than INTJ and not nearly as low-key. Always seemed to have deliberate direction, with well-calculated waypoints. Interested in the profane and dark humor, not unlike the INTJ, and also relished in reactions. "Ahead of the game", but also extremely troubled by conditions of loneliness, which sank her into existential and ethical uncertainty.
Both the NTJs had more hands-on, shameless approaches to getting to know others, while the NTPs were about building general understanding by influencing and playing with people like people are Happy Meal toys.