Add: Before anyone tries to tell me INTP is INTj in Socionics: No, you're wrong, it isn't. Do some research.
NTP defines the function order, and I defines introversion. Function order and introversion/extroversion both affect behavior and personality, as I've said. Many other things do too. 16-type doesn't define people completely, it never has and never will.P and J no longer mean anything now that you've combined Ne and Ni, Se and Si, Te and Ti, and Fe and Fi. Your INTP should be an NT and your INTJ should be a TN. With your system, only 2/4 letters matter in determining the type of the individual. With MBTI, all 4 letters matter....
There are eight separate function orders, yes, but there are differences between INTPs and ENTPs.Also, you seem to have reduced the system to 8 types instead of 16, so I am more confused now because of the E and the I. Why have E and I at all if, say, an ENTP and INTP have the same dominant and secondary functions?
This is a perfect example of the confirmation bias regarding MBTI function order, and I'm so glad you've stated it (Really).I think the most telling examples of how MBTI works are people who differ from you by 1 letter. I am an INTP, for instance, so let me look at 2 of my best friends, an ENTP and an ISTP.
The ENTP thinks in a very similar fasion to me, but he is clearly a people person. He is not afraid to go up to someone and do something crazy or ridiculous, and this is in fact his normal way of communicating about half the time. I would love to be able to do these things, but I have dominant Ti--I am much more inclined to stay back as an observer and analyze what is going on.... but that doesn't mean that sometimes I act goofy and random, as someone with dominant Ne is very prone to do.
What you're describing is the difference between Introversion and Extroversion, not some such silly concept as "Ti."
INTP: Intuition/Thinking. ISTP: Sensing/Thinking. Similar modes of operation, and the differences you describe can be explained by the Perceiving split.The ISTP is even more similar to me, but we are such good friends because the N/S difference makes for a disparity in our point of view which leads us to something we both love doing--arguing. That is our dominant Ti nature. We love to get to the very bottom of something and put our point of view into a perfect set of words. The ISTP notices details in the environment much more than I do, and I talk about philosophy and big picture ideas much more than he does, but overall we still have the same dominant mode of communication, and thus we get along much better than me and the ENTP do.
I am INTP.Overall I see distinct boundaries between each of the 8 functions and I can easily see how they fit into the scheme of MBTI/Jung. It's possible that you may be mistyped and therefore see a need to correct the system. I wouldn't rule out ENTP, INTJ, or ENTJ for you. You seem to be a lot more extroverted than most INTPs.