My sister and I have pretty different communication styles. When I have a problem, I have to talk it out - with everyone I know. I talk, and cry, and talk some more. And then I (eventually) come to a solution, which I have to tell everyone about again. Melissa, on the other hand, keeps many of her thoughts to herself. We talk, yes, but often she thinks and makes decisions and then tells me about it.
Put us in the car for an hour, though, and all she wants to do is talk. And I love it! We talk about everything. Today we laughed, we cried, we sang along with the radio, and we talked. Those are my favorite times with my little sis/best friend - and for some reason, it happens most when we're in the car.