I thought once I was INFP. Not in these terms, as I didn't know anything about MBTI. But, partly thanks to environmental pressure, I thought that
1) Being subjective and reigned by personal values was the number one goal in my life, even if that meant a rollercoaster ride, because that's what made you a real and unique human.
2) Being unpopular is equal to being Introvert. Real Es can make themselves popular, can't they?
3) Meditation was the right way out of an emotional knot (well to me it wasn't. Made the knot tighter, fueled my belief in 1) etc...)
4) Being interested in theories had nothing to do with personality, only with my brain.
And then I went to a spiritually inspired summer camp... (*) Well, in a sense, I DID find myself there. I realise I didn't want to spend my time meditating, that this Fi-dom was fake and... that I wanted to learn and find out new theories! Physics, maths, that's what I did best and that's what I wanted to do... Never mind popularity. I was unpopular anyway, whether I was a nerd or not, so I could as well be a nerd and doing the things I liked to do.
And then I went to university, met lots of scientists and found my E back
(*) It wasn't only the summer camp that did it. It was a gradual change, with lots of influences, with lots of support and people I took as example or counter-example to what I wanted to be.