2. We want to belong.
A simple reason that we tend to identify with our personality test results is that we have an inherent need to belong.
A friend of mine recently described her experience of taking the MBTI for the first time when she was in high school. As an artist, she felt different from her peers, and she said it was a great comfort to know that “there were others out there like [me].” Feeling understood and normal, perhaps for the first time, is a powerful experience, so it’s no surprise someone in this situation would react negatively to the idea that the place where they finally fit isn’t real.