All of my coworkers are introverts, only a matter of heavier introvert or a lighter introvert, but no surprise. We work alone.
My dad is a super stubborn ISTP. Exactly the opposite characteristic *and* approach to every single big or little thing I do. It occurs that when I talk or listen to him, I always have to use my secondary abilities so much that it is as if my true self never surfaced at all. It always make me want to cry. I take his views, but if I am not the rational die hard fact taker and opposes him too much, he gets all intuitive "I feel I feel" and touchy. He reacts the worst way possible if I throw feelings and nonsential talk to him, and it gets him very irritated. Most of the time I can only put up with his negative ideals and dreamworld, and can say nothing about it, except for points that I see that he would agree. He even make himself a world of people of certain characteristic to shut down and deny him from recieving info that contradicts from his ideal, especially those that he looked at in a way that will hurt his old thoughts - many times he would rather take things negatively so he can feel right, rather than spending effort to correct anything at all, and nothing at all will change his "ideal" world. That aspect I found him more like an INFJ. Some kind of INFJ that I won't like to deal with.
The cognitive function of my mbti infj and his would be a very good explaination, but way before I was in mbti I already knew it, but not in terms of mbti - my tertiary and inferior are his dominant and auxiliary, and vice versa. Personally I hate living in such a dream world, although for that I knew its not true for all infj. Real world with dreams is much better than a fake one.
Next up, my mum. She is an ISFJ in the way that we handle things and matters very similar to each other. Little does she knows, because of dad's dominance (refer to my description above) over her, which I think is a pity, she got very exellent rational skills and very good at people too. She is very helpful and make a lot of friends in areas she once worked, and her students liked her during her teaching job. The only thing she aint that good at is direction, which I suck too, but she is much more worst than I am. She don't images well, and when she lost her way, it would be problematic because she can't quite recognize places she has not been to. (Hey dont you know at least that the look of the area is not “right”. Wrong way mum, we have not been here lol) We seem to get the same feeling hands down, similar thought without dad's interference, we feel ok together. The only difference she recieve her facts in a way that is different from myself, but we process it pretty much the same way.