Well, you didn't seem to have much reserve with your emotions or the typical IEI intentionality in the expression thereof, and your posts tended to lack the sort of reflection that I associate with IEIs (which isn't to say that they lacked reflection at all, just not of the sort I generally associate with IEIs).
Also, this may be more the case with more "intellectual" IEIs (not smart, just intellectual), but I found that you didn't have the customary IEI reticence when it comes to representational symbols; that is, many of the betas on this forum, myself included, tend to avoid figurations, expressions, images, etc., that are too typical or too easy or too cliche, etc. I myself have a morbid fear of enacting a cliche (no joke) and psychologically castigate myself for such (granted, this is very likely my own particular neurosis and not by any means a requirement for IEI-dom).
Also, you seem very un-ironic, and I feel that irony is a fairly natural mode for IEIs, as in mercutio's "infp" thread, where, of course, the standard beta joke was to trot out the infp stereotypes "internet forums and coffee houses" before getting down to serious discussion. It's a way to index (that's somebody's word for gesturing towards something in such a manner as to reference it without identifying with it) the cliche while recognizing it as cliche.
As another example of this, I personally would never say "but I can hold my own, especially in written form," etc. I would have said that when I was much younger. But now that feels like too baldfaced a declaration of status. Such a thing begs substantiation; to say it only, especially when it isn't necessarily a generally recognized fact of the community, seems disingenuous.
Another another example is that betas, in my mind, tend to be more subtly effusive than I've noticed you being. For example, a beta will often use understatement, letting a "
" or a "
" stand in for "I have great appreciation for what you just said, and the fact that you said it caused you to rise in esteem in my eyes." Or perhaps they'll say something like "I really like you guys," but never to actually mean "I really like you guys," unless it's intentionally a very blunt statement (in which case it is implicitly recognized as such), and even then it tends to be an understated stand-in for something else.
I think this all has to do with subdued Fi; in beta, you want to let someone know indirectly, rather than directly, how their actions affect your subjective feelings towards them. Note that this applies only to statements about one's feelings/sentiments
towards someone else, which is more the domain of Fi, as opposed to one's changing emotional state atm, which is more the domain of Fe. Betas have almost no problem with a statement like "I am extremely happy right now." It's just that betas will tend to filter a sentiment like "you are making me extremely happy right now by doing x" through a statement like "I am extremely happy right now" leaving the recipient of that message to
infer that they are the cause of the happiness. In short, I feel that most betas rely more on implication and inference than you seem to, in general forum behavior.
Also, you annoyed the italian potatoes (like my new expletive substitute?) out of mercutio instead of just getting out of his way/ignoring him. Most betas know the right vibe to give to SLEs, which you didn't seem to know as instinctively as your average IEI.
Plus, you know, the whole vibe/energy/feeling thing.