I can fully appreciate the introvert dilemma. I discovered more about myself also through the testing. This made it more real for me; http://www.slideshare.net/lntrullin/the-simpsons-myersbriggs-test
Also have started running, live beside a small forest in Co.Armagh and so I enjoy the soundscape of the sleeping forest.
For myself personally, I could never understand why my enthusiasm was high for activities and challenges yet never for attending events or parties. As an introvert I now know that answer.