I'm uncomfortable about establishing and evaluating the level of relations with other people. It sets off all alarm bells if someone tries to actively befriend me and I usually expect them to have a hidden agenda in that case (what do they want from me, it's time to be careful with this guy). This is more in real life, though, on the Internet the stakes are too low to get too paranoid. I'm often second guessing how people feel about me and can't seem to come to conclusions unless they display it extremely clearly and keep doing it.
I often prefer relations to be businesslike, so that it's always clear what I'm getting out of it and what I need to provide to them in return. If someone provides me a service for free I feel awkward and put at a disadvantage because I don't want them to expect something from me in return in the future. I don't mind doing such acts of service myself, because then I feel like I'm at an advantage and that it might come in useful sometime. Someone addressing me by name typically smells like an attempt at manipulation and makes me uncomfortable and suspicious.
It's also fine to enjoy doing things together, joke around and have good surface-level relations, so that nothing is expected from the other and neither tries to get too close to the other, starting to inquire about personal life, values and stuff like that. I never do that, I'm just not interested about the personal lives of other people.
I can't stand political correctness and sensitive feelings. I think people need to have thicker skins and just deal with it instead of getting upset. It's even worse when people get hurt on someone else's behalf, that's the most ridiculous thing I can think of. I don't want to restrict my blunt output to avoid hurting someone's feelings. Fi leads often seem judgemental and I don't like it.
A typical problem with a Fi user that I've had is that I say something off-handedly or as a joke that wasn't meant to be a personal attack, but they take it as such and get wound up. Then I say that I didn't mean it that way and it was just a joke, but their response is along the lines of "You don't get to decide how it comes across to me. You hurt me, now I have the right to be angry at you". This is just something I can't deal with in close relationships, it's like walking in a minefield and I set them off constantly. I can just ignore such insults/attacks and especially if they clarify that it wasn't meant that way then it will be fine by me and doesn't need to be dissected further.
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voider, I'd just like to add as a clarification that I'm not suspicious about you personally. SEE seem straightforward to me in a good way. This is again an example of how I feel about Fi, I either don't give a shit about feelings at all, or if I do like someone then I'm afraid of accidentally saying something that will offend them when that wasn't my intention.