I'm pretty sure Kirk is ENTJ. Here's why: he leads with forceful Te, and couldn't care less about social conformity, whether or not his status gives him authority or rules; even when he's not supposed to be on the ship, he has the nerve to rush right up to the captain and wastes no time with niceties. He's also extremely impatient, which is a common trait of ENTJ, and Te doms in general. When he needs to draw emotion out of Spock, he doesn't hesitate for a second to hurt him to get to his goal either (low Fi). He's logical, efficient and able to see and make haphazard plans and adapt on the fly in an almost rapid fire manner, which are all traits of ENTJ- it's said that the function stack placing Se in the third slot makes them more adaptive and in the physical elements than other NT types. He marshals resources in human potential, and takes information from pretty much everyone to serve his visions, another stereotypical trait of the ENTJ. At the beginning, when he's hitting on Uhura, he's charismatic but in an arrogant way, showing off what he knows, not taking no for an answer and not even hesitating to start a fight with half the bar. Think about it, for much of the movie, he's bent on rescuing captain Pike. He plots, plans, maneuvers and strategizes to do just that (high Ni). His character development shows what a decent and more well balanced ENTJ can be like, rather than the standard villain or evil boss persona. He can be empathic, and shows the utmost care for his crew- this is something ENTJs are capable of if they work on themselves.