Last year I took a personality test at psyblog that measures agreeableness, extrovertnes, etc.
I took only 2 or 3 out of the five tests. Because the extrovert test was a biased one. It only focused in favour of extrovert people.
My result showed that I was an ambivert with a commentary of how I can be the successful, the extrovert.
I was disappointed. Your article gave me hope(I really smiled happily though I don’t have all the nine signs). And I will use this ambivert nature of mine in this year and beyond to develop better habits, learn better, add more joy to my life and be more successful.
PS: I respect the expertise of PsyBlog author and I am still an avid reader of his content.