Ever did a personality test?
If you did, it is likely you got a result based on the “big five” principle, meaning you got something like ENFP-T, INTP-A, or ESFJ-T, to name just 3 of the multiple personality types that are most often used.
In theory, the idea is great, however, in actual effectiveness, the big 5 personality principle is as broken as it could be, and calling it actual psychology may even be stated as a lie.

I had my personality tested on several separate moments, and the results was that I am an ENFP-T..
.. and an INFP-T…
That seems weird, right? – The I and E parts are opposites of each other, and stand for being introvert or extravert.
Now, what extravert and introvert stands for is quite simple, an extravert is an open person, think of someone who likes to do things together, while an introvert is the opposite, they prefer to do things alone, and that’s already it, as it doesn’t mean more than that, as it’s not like an introvert never does things together, or an extravert does not prefer to do things alone.
Seems like this would work for everyone, right?
Well, that’s actually not the case, like it ain’t for me.
Those who know me, by more than just reading a few messages of me, know that I switch over from these personality traits very quickly, one day I am as open as I can be, and other days I am fully retracted to my own..
Sounds recognizable? – If it does, then you’re doing things right, as factually, that is how the majority of people actually are…

Extraversion and introversion, the actual recognized traits behind being an extravert or introvert, are not a way of personality per se, at least not when it comes to being a fixed way of being.
Our mood is like a flow that goes up and down as time progresses, at least, it should be like that, the mood is caused by basically our personality choosing ways to respond to certain situations at our lives.
Because of this flow, we don’t truly have 1 fixed personality, as our personality is basically also a flow, hence why we could change, if we really want to.
There are too many causes to name that could trigger these flows in personality, but a few extremes would be the practice of indoctrination, the effects of trauma, or (the most obvious example of) being in love.
The fact is that, when it comes to the openness of our minds, we are changing too often to classify as a fixed personality trait.
Which is unlike the other traits that are used within the personality tests of the “big five” principle.

Though, and this is an actual question for those who believe in these personality tests, what do these traits truly say in the first place?
Something that is missing often by those active at the subject of psychology is the ability to “think outside of the box”..
The reason why there are disorders that need to be classified, like Autism and ADHD, is not because it is that necessary, but rather, because we need to classify too much.
Just think about how many stigma would be taken away if we would just say that someone has problems with concentrating, which is a well known part of ADHD, or that someone is unable to process things as fast as others, which is a well known part of Autism.
In reality, this is even more factual at the subject of personalities, as it doesn’t give any true clarity if someone says he/she/it is an INTJ-A, as in all honesty, most people wouldn’t have a clue what it means without checking up on it.
It’s great to have many difficult words, but ain’t the actual practice of psychology about studying the mind and behavior, meaning that everyone active at psychology should have most clarity of us all that classifying everything with words rather creates a mess, instead of structure?