I think I just need to have this as part of my footer on every post I make, but mbti is just a classification system anyway, and describes overall trends. It's not gonna speak towards every aspect of psychology. And as you already point out, there are individual differences within type. Age and experience can play big roles too. I think I am much more open now than I was 10 yrs ago, although in some senses am still reserved. I see personality as having the potential to be a lot more fluid than mbti seems to account for.