On that Grunge thread you just seemed really extroverted to me, that's all. More EXFP. I guess it was all of the high energy emoticons, etc.
I think those cognitive functions tests are confusing, too. I test equal Fi and Ni on them as well. Personally I think the markers they use for Fi are a little off, and probably for Ni as well, because it's incredibly apparent to me when I talk to INFJs or listen to them that we are coming from an entirely different orientation. I feel quite in sync cognitively with fellow INFPs.
I agree with [MENTION=8584]SpankyMcFly[/MENTION] that it can be helpful to determine Fe vs Fi, because they are
really different. This explains pretty well what I'm talking about.
http://www.typologycentral.com/forums/showthread.php?t=17960&page=3&p=2147638&viewfull=1#post2147638
How would I summarize the functions you're wondering about?
Ne is about multiple possibilities/options. For example, if a Ne user is presented with a precept, let's say, 'if forced to choose between right and kind, choose kind', and asked to explain it, the Ne user will think about example after example where this precept would play out. Through thinking of all of the possibilities, the precept will be better understood by the Ne-user. It puts the idea 'out there' to grasp the concept.
Ni would take the precept itself and look at it from different angles, because Ni is more interested in concepts than possibilities. What does this precept mean, exactly, Ni would wonder. Why was this precept created? Where was the person coming from who created it? What was the cultural context, the personal context?
As far as the judging functions go-
Fi is personal. Basically it takes in extroverted perception and assesses. How do I feel about this precept? Is this congruent with what I consider right, with what I value? Or does this bother me to an extent that I feel a need to point out how stupid or wrong it is?
Fe's assessment considers others more. How does this precept affect society? Is it beneficial or harmful? If we all share this value, is it a good thing or a bad thing?
Obviously, everyone will do all of these things to an extent. It's what you do the most, and what your natural go-to is. I think it's best to figure out the top two and then narrow it down to the top one if you're confused. For me, Fi was so obvious it was a bit of a no-brainer. My issue, actually, was more Ne vs Se which made the Fi dom all the more obvious.
I would say the fact that you can relate to all of them to an extent lends itself to you using Ne, because Ne is more likely to entertain all the options.
Oh, and Se would say- Just give me one specific example of how this precept plays out so I can use it.
Si would say- I remember an example of how this precept played out and how it has shaped my subsequent perceptions.