The weird thing is that I relate very well to INxPs, and sometimes feel like I have more developed F than some other INTPs. But I don't feel like I relate to INFPs all that much. There is a bit of a barrier there where I run up against the Fi, which I can appreciate from a distance, but then I don't know where to go from there. My sense of humor usually runs along the lines of, "If it's funny, it's not offensive"--I don't set out to hurt others' feelings, but I don't go overboard on being sensitive about it, either, and there are very few sacred cows for me in that regard. Also, INFP tend to be much more involved in "making a change," having a favorite political cause or whatnot, and I tend to be much more apathetic or cynical. I feel like I relate more to INTJs and then ENTPs, and then maybe INFPs.