Introversion is "the state of or tendency toward being wholly or predominantly concerned with and interested in one's own mental life".
Extraversion is "the act, state, or habit of being predominantly concerned with and obtaining gratification from what is outside the self".
Life is not a math equation. There are no clear cut answers and if you think there are you are probably wrong. Although ignorance can be viewed as an Occam's razor, I think sometimes the harder and more complex answers are the most reliable.
When I first read the definitions above a few weeks ago in my psychology class I immediatley tried to define myself as one or the other. After this momentary tug of war ceased I put it out of my mind and continued following along as my teacher lectured. After spending my free time ponduring on which I am I can only try to explain the results and hope you understand. Now in our culture the term "two faced" is negative and the meaning is pretty obvious. I think to be two faced has become human nature just as lying has. One might never maintain a relationship or make a friend if they never kept certain thoughts to themselves. I think the honest person in me is an introvert. I have many opinions that I keep to myself such as atheism. I have spent hours of research on the subject and come to the conclusion I am an atheist. This was all done for myself and my own mental life. I don't push this onto other people. Just because I don't beleive in God doesn't mean I don't support religion. I don't beleive in Santa Claus but every year I set out the cookies, but I digress. Now in other instances, such as with my humor I am an extrovert. Nobody thinks of a good joke just to keep it to themselves. Humor is basically the main way I function socially. I personally think most of my strongest friendships are based on a shared sense of humor. Now considering I think the two biggest parts of my life are my intelligence which comes with school and my humor which comes with relationships, it seems as though a can't be JUST an extrovert or JUST an introvert as I'm sure is true for many people. I personally just prefer to think of myself as someone who seeks gratification from others and himself and not necesarily through the same path. Now I agree this whole piece lead to a very unfilling conclusion. I also know that some of you may not have enjoyed it. But these are my sporadic thoughts, and thoughts my friend, are the finest example of self gratification.
Idunno