Well, what do you think made you INTP?
I think that it was my dad that really made me INTP. He would always tell me to ask questions, and he would always question things that my mom watched, like soap operas celebrity stuff. So I guess I just kept doing what he told me to- ask questions. That's probably what fueled my INTP thirst for knowledge.
You're talking about personality type like it's something that can change. That's not how it works, it's something ingrained, but let's suppose we change the definitions around so that type is malleable, by associating it with how you would score on an MBTI test.
So, I'm an INFJ, but in an MBTI test I could easily score as INTP because I'm so Ti heavy. So then the question is what made me Ti-heavy.
Well, my father is an INTJ, so there's probably a genetic bias towards me being more Thinker-like as well as an upbringing that would have rewarded the use of Thinker behaviour/cognition.
There's also the pressures of the world at large, for example schooling probably emphasises T traits rather than F, and so does the workforce. Being heavy in Ti means that energy is taken away from Ni and Fe. So the environment is going to essentially punish the use of those functions by how it is set up. There's probably a bias towards seeing Ni as crazy, and there's pressure on males at least to hide one's emotions and put on a calm persona.
Then there's life events which have so badly affected me that I have shut out emotional expression and imagination, whether these are big events or a succession of smaller ones.
Last, I have to take some of the blame myself, I can't just blame my circumstances on my environment. The fact is that I have put more effort into trying to remain calm and doing logical analysis on things, and not enough time feeding my natural inclinations. I didn't understand what I was doing, and I still don't quite understand why I use Ti so heavily when I know I should be focusing on Ni and Fe. But the key to getting out of it is to make the changes myself.
So answer: I'm an INFJ, but I may score as INTP because life.