According to the Meyers-Briggs test, I am an ambivert. I took it one time and scored as an introvert and then again and scored as an extrovert (pretty much in the middle). I was definitely an introvert as a kid. I wanted to be alone all the time and was very shy. When I started taking anti-depressants around puberty I became more extroverted. I am glad to be in the middle now. I think either extreme would be difficult.