This won't be a blog post for everyone. If you are familiar with the MBTI [Myers-Briggs Type Indicator] and have struggled to type yourself thanks to years of personal growth work, you may, however, find it both interesting and useful.
The problem with personal growth work is that you are intentional about developing certain personality traits that you perceive to be weak. This can lead to an emphasis on activities which exercise a weaker function. Gradually, you get stronger in that area, which makes it hard to remember that it was ever as weak as it was. That is what happened to me.