I've just found a bit of a curiosity searching the internet about various different types, including the ENFJ [MENTION=15318]Nights and Days[/MENTION].
One conclusion I've noted from my studies: The difference between Fe and Fi is that Fe seeks external validation to prove that the user is successful/good/whatever (grandiosity akin to Narcissistic egocentrics) , while Fi seeks internal validation to prove that the user is successful/good/whatever (grandiosity akin to Psychopathic egocentrics). Through this, I have realized that my sense of self worth is actually internally based rather than externally based, and that my sensitivity to criticism is not a manifestation of Fe, but a manifestation of anger, that someone would dare call me wrong or criticize anything about me when I have such a high pedestal for myself in my own mind.
But Fe would explain my chameleon behavior though, right? No. This is actually the product of a very so/sx ENTJ mother that learned how to play the games of Fe from an early age to survive (literally). My mother raised me to appeal to people, to learn the game of social structure and play it well so that I could further my placement in society when the time might arise. Naturally, being the socially awkward Ni dom child I was, I began to build a framework of how people played the game of society and learned the social game through mimicking extroverted people in real life, and witty, extroverted protagonists in movies, and adding that mimicry to the framework to see how the game works in my mind. Through this, I learned how to make friends easily by feigning interest in their lives and by feigning warmth in order to appeal to people in order to build myself up socially.
Now, considering the fact that I had the feigning interest and warmth to my advantage, I built myself a persona to entertain people for longer. This persona would be like the characters in the movies: witty, sociable, friendly, and comical. I learned how to make people laugh easily through the use of spontaneous utterances that somehow made sense and were incredibly witty (sound anything like an ENTP?). It may have also helped that I was being raised to the motivations of a Type 3, which is linked to social chameleon-ism like Type 9.
Over the past couple years, this persona (and the other few I developed for different people) began to feel absurd, unauthentic, and empty, which was mostly due to the fact that my tertiary function was developing, Fi. Fi wants to build a strong identity, and it tries to accomplish this by cultivating emotions into an intense, reckoning force that will define who I am, what my values are, and what my drive is, and began pushing myself to attempt ushering my true personality into the real world, which I slowly did by phasing out my outside persona(s) with my close friends but still keeping it up when I'm around people I don't know, and don't trust (coming back to this in a minute). Fi provided confidence in my own hidden identity.
Now, given this dominant and this tertiary, there is only one type that fits those, but there is something missing, where is Te? Te is underdeveloped and trying desperately to keep up with my new-founded Ni-Fi loop, but at the same time is being put down by its shadow, Ti, due to pressure being placed on my math/science department from an incredibly hard class (that's all the details you're getting), forcing me to figure out how something works according to my own logic rather than objective logic in order to keep ahead of the game (Math being the mascot for Ti).
The Ni-Fi loop actually explains much in my life, from the delusions of grandiosity and superiority to a pseudo-paranoia of everyone and their motives. Now, assuming that this information is all correct and logical, then that means that I must develop Te to get out of this and begin returning to a more healthy state. So I'll start by gathering as much information as I can, I need several opinions, thoughts, and comments on this.
As for the ENFJ, I don't actually use Fe so much as I do feign it, and even then it is nowhere close to being the dominant function. Through various theorems concerning Shadow functions compared to the preferred functions, developing the preferred function also unconsciously develops your shadow function, meaning that Ti would be just as strong as Te, and since I am using Ti pretty powerfully lately (so there is no way in hell that Ti would be in the inferior slot, usually the place for repressed and unconscious functions), Te must have close to the same amount of development, but it is trapped due to the Ni-Fi loop that is self-validating rather than looking externally for evidence like I should be doing.
Current theory: INTJ 3w4, will back down if proven otherwise, but Fi is saying I'm on the right track.