You're always learning about yourself, if you're honest with yourself. It's very tough to be honest with yourself. We all are dishonest with ourselves, a lot of the time. We don't want to deal with something, so we compartmentalize it.
My favorite thing to do is action-driven, emotionally-charged scenes. If it's not just two people talking in a room, but it's on the move and things are happening and it's chaotic, and emotion comes from the characters and from the action, and the fall-out ultimately changes the character relationships, that exactly the kind of stuff I like writing.