Hey, fancy that! Me too. INFJf, while it has great people, tends to be too fluffy for my tastes; I've never been a very touchy-feeling INFJ, though.
Indeed, we have the capacity to be perhaps the most detached and precise of the Feeler tribes because our Fe is book-ended by Ni and Ti on either side. Ni just cares about its vision of the world, formal use of Fe systematizes mankind, and Ti loves its logical consistency. Very potent when balanced (i.e, Matt3737), yet can also be very dangerous. I've heard a lot of people on the internet describe our tribe as 'the most cold and rational Feelers out there'. Anyway, I've preached enough for today, onward!
Yeah, it's nice to ponder the essence of things. It feels good to just let go of all the weight associated with people and think. Admittedly, I believe I've been a little dogmatic towards you in the past regarding functionality -- a free will thread, if I remember right. Sorry 'bout that.