JD - ENFP (zach braff is enfp)- his Fi isn't weighty enough, he is Ne first even if he is geeky, socially awkward, and highly intimidated by the situation. can't tell if he's supposed to be a 9, 7, or 4. 9w1 or 7w6 make the most sense to me. probably a 9.
Turk - ESFP 7w8
Cox - INTP- gets out-gamed by jordan, at times, who maneuvers so well. but he loves the challenge, and when he makes ethical choices, it's all based on principle. a logical coherency, etc.
Jordan - ENTJ
Elliot - worst character ever, real-life actress is probably a T woman- there's very little accurate F projection into her character, she doesn't ever really make sense. you get the impression, especially as the show goes on, she becomes a J type, but she's so muddled. probably depicted as S too.
Janitor - ISTP
Carla - ENFJ- her Ni holds a lot of things together, seems to have a big-picture sense. when she doesn't know what to do she actually recognizes her own deficiencies which makes her seem more self-aware than esfj. confidence seems more enfj than blustery esfj.
Kelso - ESTJ- in-charge type, Te dom, Fi inferior.
this show is the anti-house. both get fucking cheesy as hell.