Hello, I am an ISFJ (who thought they were an ENTP for a long time), due to having reasonably developed Ti. I know a few of you guys have had bad experiences with xSFJs in the past, and I am not here to try and fix things. I am here to find out more about INTPs, and how Ti/Ne manifests in you. And I am also interested in hearing about your past experiences with xSFJs (and where it went wrong/right and why it went that way).
I come in peace, and will be lurking these forums (which I found by accident) to find out more about you wonderful people and how your beautiful minds work. Please be gentle, and don't tear me apart. I'm a very curious Luchador
Thank you.
Welcome. Can I ask where you got your information about ISFJ? Also, have you taken an official MBTI test? If you are in college, that might be worth your while. They often do it for free at career centers, and the examiners are generally, but not always, knowledgeable. I took advantage of it. Typed as INTP in my early 20s. Now in my 30s, my type is even more apparent.
I would not recommend trying to develop your tertiary/inferior functions. That's a recipe for disaster. Better to focus on developing your dominant and auxiliary functions, whatever that might be. Doubly true if you're young. Type is hardwired. The lower functions come into greater balance with the top ones over one's life. The inferior function is the one to watch out for because it can lead you to make bad relationship/career choices. That's why it's important to get your type right in the first place.
As for experiences I've had with ISFJs in the past...I had a brief relationship with one. It ended very quickly. No mental connection whatsoever. She was broody and quiet. I think they tend towards having a depressive streak...it might never be full-blown depression, but I think it's always a low-level kind of melancholy for them

. My father is ISTJ, and they also are Si dominant. She was also pretty anal, obsessed with cooking/food and not much else, felt like she had to be dutiful and responsible (to her parents) by studying hard, very loyal, interested in finding her soulmate asap and just getting it over with, no desire to experiment when it came to dating/relationships, hated drinking, smoking, all vices, wanted to be super healthy and clean at all times...that's all I remember.