Male INFJ 5w4 (Sx/Sp)
While I can understand concrete information really well, I still prefer to think about abstract concepts. However, when it comes to information concerning personal growth, I prefer it given to me straight up, as I find it more effective that way. But that was a learned lesson, and I didn't think that way at first.N dom and aux understand abstract information more easily than concrete information... by far. Your hunt for type might not be over with.
Also, introverted Intuition isn't just focused on abstract concepts; it can focus on concrete concepts and then combine them into a specific framework.
It also depends on how developed you introverted thinking is. Lots of INFJs are computer programmers for example, a field of study that requires strict logical laws that systems need to abide by without exception.
I've done months of studying, taken dozens of tests to narrow down the playing field (scored INFJ on all of them, INTJ once), studied the cognitive functions and how my behavior changes depending on the context I'm in, and I've concluded that I am an INFJ.
Personally, I would rather be any other type than an INFJ, but that's who I am, and I am confident with that fact.
I don't think C.S. Joseph is an ENTP either, or if he is, he is a pretty unhealthy one. He personally reminds me of an old boss, where he would act all high on authority when he had a position of power over me. I believe that it's his personal bias getting in the way. I also don't tend to watch his typing videos, as he types people based on a few minutes of footage, when the person in question may not be in their natural enviornment.C.S. Joseph’s information is incorrect about Ns. He thinks he is an ENTP... an ENTP would never talk like him... or put out the very unoriginal charts Josephs does...an N would expect people to at least think for themselves as far as CS Joseph’s has and would never even think the stuff he is pulling out would be needed... plus he’s wrong... flat out horribly wrong on all of his concepts... he’s an ESTJ for sure, and I guess if he would realize it and understand functions correctly then his strength in the MBTI world would be to explain things to Ss. However... he gives out some of the poorest information on and N and F stuff that I’ve ever seen. So I really wish he would stop putting out content until it is correct. I do think we need more S personalities explaining things... but stick to what they actually experience maybe? Just quit giving out really horrible, and in my opinion then damaging, incorrect information!
But that doesn't mean there aren't things he is right about, or you can take away from him. He deviates from a pure MBTI structure, and his system has been modified several times, starting with Linda Berens (who I think produced largely the same amount of info C.S. Joseph did). Instead of focusing on MBTI functions in of themselves, he (and people before him) predicated type on observable behaviour. I believe it's more accurate and observable than the MBTI tests, but it's not a flawless system either. For example, behaviour can change depending on the situation. You generally can't be sure when a person is most comfortable to observe their general behaviour, so I don't like it when C.S. basically calls anyone who calls into question the validity of his system stupid. But at the same time, I think it is an overall improvement.
So if you engage it from a purely MBTI viewpoint, there are going to be a few things you disagree with. But from what I can tell, his system is more accurate than the standard MBTI test. Do you have any specific examples on what he is incorrect about? If I am getting incorrect information, I would like to know.