I've taken this test before with very similar results. I don't like the term "introvert" because it comes with so many preconceived notions that I don't think are true about me. But, I can't disagree with most of this test.
I too took that test in the late 90s I am an ISTJ would love to go sky diving, would you do it again? I also been to a nude beach and skinny dipping including skinny dipping in icy cold water
Yes, I would skydive again in a heartbeat. I loved it, but it is expensive. Never done the polar plunge thing, but I did do a naked snow angel once. Does that count?