Um, I don't really agree... my dad is an INFJ and we annoy the hell out of each other
That’s fair! Though I would say that relatives hit differently than others. I always find it hard to type people who I’ve known for a long time. Additionally, I sometimes find it difficult to apply generalities about a given type to a friend or family member whose types I’ve identified.
On top of this, your preferential types isn’t just a function of your personality type but it’s got to do with how the rest of your cognitive functions line up as well in addition to environmental factors. I know ENTPs who don’t prefer INFJs, and that’s perfectly normal! I personally have a serious thing about intuition + external feeling being in other people (and I’m pretty sure it has to do with my urge to blend in and fear of not being accepted by groups of people)... but the point is it’s not based on me being an ENTP alone!
On top of top of this, societal factors including gender, race, how you grew up etc. play a huge role in what you search for and why even. So when I talk about INFJs being my type I’m fully meaning me ;).