Most people read Keirsey's "Please Understand Me" as part of a requirement for a course. I read it for fun. This stuff is hugely interesting to me!
I hit all of the indicators for INTJ pretty squarely every time I take the test.
I've spent most of my time shunning all things "girly," so I've been quite baffled as to why I like Celestia so much. Perhaps the answer is in the personality type indicator. I'm not sure that we see her behavior often enough to make a true Meyers-Briggs analysis, but INTJ does sound like a good call.
I have always seen Twilight Sparkle analyzed as an INTJ, but INTP actually makes a lot more sense. This chart is cool stuff!
INTJ, INFP, and a few other types are considered "rare," though they are actually somewhat common in Internet gathering places like this. I think that Internet discussion areas attract introverts in general because it allows us to seek out interesting conversation without appearing rude. It's everything great about a social gathering without that exhausting social gathering part.
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