Wow, thanks!
Yea, I agree.
Yes. A lot of people like to see MBTI as someone's behavior. I think that's somewhat correct, since they use cognitive functions to make decisions and act.But it's actually how they process information, as you said it. I just got to know about these and they seem rather worth my extra effort studying about. Each personality type has four cognitive functions. However, different personality types put them in different orders. These orders are 100% personal preference. This creates their primary, secondary, tertiary and last function. Humans use these functions to comprehend information and make decisions as an output. Cognitive (internal) functions are used to process information while external functions are used to produce an output. Some personality types of some human could change either because they now see things differently, or made drastic changes to/reevaluated how they think of things.
So, based on a study I held, (on my own) and a test I've previously taken, I'm an ENFP-T (NeFi). I'd say it's accurate, even though I used a test. From my observations, I tend to get sidetracked easily. I also tend to have vivid imaginations and have sudden bursts of energy when a new idea comes and hit me. This is caused by my primary function, Extroverted iNtuition (Ne). Also, I found out that my secondary function was Introverted Feeling (Fi) as I usually decide based on my moral values and "what-my-gut-said".
I sometimes feel like an INFP though. Because I'm 47% extroverted. I feel more like an ambivert, but that's no question because 2/3 of the population are ambiverts.
I actually found a website where there is rather good (and understandable) information on NeFi and other functions. The website was where I based all this information from as well.
https://www.typeinmind.com/nefi