Oh, no, sorry to have used fairly obscure terminology!
It stands for "Perceiving, introverted", like pinkgraffiti said, Ni or Si.
The reason I mention this is because you don't come off as a Perceiving-dominant, even a -J Perceiver (IxxJs). Perceiving dominants tend to be more... waiting, in a way? They are more passive and responding, even the J varieties. Your energy is very reach out and welcome. It's very warm and open but it's also forward and actively inviting. That's why I mentioned e2, as well, because there's something about you that's noticeably forward-reaching. I'm not saying I necessarily think you're a 2, but I'm trying to account for that warm, embracing, forward-reaching energy, which is not particularly characteristic of either e1 or IxFJ.
The IxFJs can absolutely be warm and welcoming, but it's more held back and more waiting to be engaged. I don't know a huge amount of IxFJs, so I could be wrong, but most that I know tend to be more sincere and polite than actively welcoming. They are introverts, after all, and tend to keep their outward engagement of energy more contained unless a specific reason for its usage presents itself. Introverts seem to be havens in and of themselves, wells of pleasantly humming self-sustaining energy, but with you it's like you reach forward and it seems like an outflow of warm energy that's been held back, like there's more and more and more where it came from.
