I am as equally extroverted as I am introverted on this chart, because I can turn on and off the personality I want... that is a learned behavior from me being around people, I also feed off of peoples energy very easily. I am naturally left brained, but can be a right brained introvert in uncomfortable situations...
Now, horsenalities and personalities are VERY different. There is a difference between species, the "ultimate predator" and the "ultimate prey". Now, stop imagining yourself as a horse and come back to humansville.
Take this test, http://mypersonality.info/ .
Here are my results, http://mypersonality.info/mariahhelms.
I am an ENTJ, Extrovert - iNtellect - Thinker - Judgmental, also known as " The Chief".
The more you learn about yourself, the more you can read people and learn from them. Remember, "Body language is the universal language." - Pat Parelli