As a for instance, user name iannau and I have been good friends long before joining this forum, we're certain from our interactions that we are the same type (SLI) It's probably looks like we are rather different (I imagine) on the forum, which in itself shows that ascertaining ones type, unless they talk about themselves to a reasonable depth, can often be a tricky thing to do on internet.

LokiV, on our smaller interaction, seems like SLI identical vibes to me also. I can't comment on other people here but it's not unreasonable to say it may be a similar case also.

To say that ISTp has no interest in socialising for instance isn't really the case. Everyone needs human contact to varying degrees.. Not all ISTp's take off on their own for a month long back packing trip due to real life commitments, but you can be sure they'd want to, maybe even planning to at some point.

In terms of using Fe, showing some outward signs of Fe and actually having ego Fe are two different things of course.

I just wanted to make some observations here, and how for reasons mentioned, there can be deeper counter reasons.