I am both a musician and an author... both of which add up to me being loud and talkative. That doesn't mean I can't listen, but I definitely enjoy contributing to conversations that interest me.
I am very grounded in what I believe, so much so to the point that people who don't know me accuse me of being stubborn. This actually isn't true; I've just researched their arguments and prepared defenses against them ahead of time. Yes, I am a bit of a dweeb in that regard.
That being said, I'm also highly spontaneous and would have just as much fun backpacking through Europe as I would relaxing while watching a movie.