I gave my Dad the Keirsey Sorter and he scored INFJ. This came as a shock to me. My mother's very obviously an INFP but my Dad has always been unemotional my entire life. At first I thought he might be an INTP and then an ISTP. INFJ traits: - He's generous to a fault and an easy target for con artists. He would give money to people who called for charity until my mother made him stop. - He's always been interested in creating products to help children---he's a computer scientist so mainly software. - Whenever he's around children, he starts "mentoring" them. I witnessed this on a visit where we went to a science museum. There was a bed of nails that people could lie down on, and he just stood by it and talked to the kids who came by, encouraging them to try it and put their hands on it. He spoke in this very "encouraging" voice. This is completely different from how he interacted with me, which was more...manly. - He reads fiction obsessively. ISTP traits: - He was very interested in sports and good at them too. He played one sport varsity in college. - He didn't really apply himself in his youth to academics, being more interested in sports and wanting to work in the dairy industry, but he ended up with an engineering degree. - He likes to explore whenever he goes someplace new. - He seems to be unaware of his social responsibilities. I'll bring my kids over to their house and he'll just want to sit and read instead of playing with his grandkids. - He is a big do-it-yourselfer. He did some amazing things to our house when I was growing up and managed to double its value (with a little help from the real estate market). When he goes golfing, he will often just ask whoever is at the course to play. This seems weird to me but perhaps is normal for golfers. My wife is a true ISTP and he and she are not exactly alike. She seems to have more street smarts. He seems like a definite Fe user so I ruled out INTJ. He's not big on theorizing and he's seems to have that "chart-the-course" attitude so I ruled out INTP too. I suppose, if you take the time to read this post, I'm asking, is it possible that my father is an INFJ who is somehow "screwed up" into not being all that emotional? His father was a very overbearing ENTJ and his mother an ISTP and he is also Scandinavian so that adds extra lack of emotion to the picture.