I never knew I was an introvert, at least not now. I was a bit of an anxious and social introvert when I was young and now Many people would call me an extrovert but I guess I probably fit into this thinking introvert category.
I actually don't like to think in these scientific terms when talking about personality because there are so many subtle nuances, this all depends on what kind of environment you are in, culture is a huge factor. I think most people become introverts when they are outside of their comfort zones....some people never find their comfort zones....and some will remain comfortable introverted. It's all really fluid but that's not to say there's any problem analyzing it this way. The most important thing is that we encourage people to be themselves if it doesn't directly cause problems for others.
Great post. Followed.