You'll bring a lot to each other's lives in the realm of communication and self-understanding. You'll notice from the start that your conversations almost always veer toward intense subjects, even if you try to keep it light. Actually, it will be your friend trying to keep things light and fun, and you that keeps turning toward deeper, more important concerns!
Your friend may find it easier to put deep or abstract concepts into words than you do, which you'll appreciate. And you can help them, too; you'll encourage them to look beneath the surface of their own mind and see what lies beneath. Self-awareness will become an important focus for both of you. You'll deepen your friend's interests. Just be sure to stay open to and accepting of each other's different ideas and attitudes, to get the most out of this connection.