I don't think there's such a thing as an "innate personality" - I'm a very different person than I was 10 years ago, and having just taken the test right now, the results are also likewise different (INTJ -> ESTJ if anyone's interested).
IMHO your personality is not something set in stone - it's a rather slow-changing beast surely, but I think it's a fallacy to believe that it's somehow cemented by some age.
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I don't think there's such a thing as an "innate personality" - I'm a very different person than I was 10 years ago, and having just taken the test right now, the results are also likewise different (INTJ -> ESTJ if anyone's interested).
IMHO your personality is not something set in stone - it's a rather slow-changing beast surely, but I think it's a fallacy to believe that it's somehow cemented by some age.