I still have uncertainty if I'm actually an INFP or an INFJ, but since Fi seems to clearly be my dominant trait and I don't relate to S, INFP is what I've been considering myself.
Despite the uncertainty of if I may actually be an INFJ, I only feel a connection to a few of them here (with INFJs here, its usually either a "ya, thats almost exactly how I think", or a "I defiantly don't think like that" reaction). I think I'm actually a lot closer connected to the INTPs (at least on impersonal matters), but I think its worth mentioning that when I read posts from ENFPs its usually very easy to understand them, but since I'm introverted, I don't "relate" to them so much as feel what they are saying, they are just looking at the same things from a slightly different perspective.
I don't knowingly know any ISFPs (are there even any that post here regularly?), so I can't say for certain how well I'd relate to them, but since I relate to all the other options, thats the one I'd have to choose by exclusion as the least likely to relate to (but they would share Fi as a dominant process, so I'd probably still mostly get where they are coming from, I just probably wouldn't be able to hold a conversation with one without mutually boring each other)