All great answers. I especially like the last chord on that Pirates video. I'm going to work on it... I think by just seeking an answer on musicality you are on your way to understanding it, and its a life long journey. I've noticed that sometimes, when my wife talks to me about some issue while I continue to play, I'm listening to her and still playing, I find my playing actually improves. That while my "left brain" is engaged with my wife, my "right brain" is allowed to be more expressive. So I look for moments like that in my playing, and try to learn how to engage and disengage expressiveness. One of my teachers quotes Schnabel who said, paraphrasing, you learn musical expression through life, not at the keyboard. So this too should be considered, that expression of sadness and joy are life experiences that we can bring to music. Also, you help youself gain musicality by knowing the piece(s) well, by having developed the tools of the trade through practice that free you from the need to wrestle with a piece and allow you the freedom to express. And, playing pieces with obvious dynamic shifts and speed changes might help you learn the subtle art for applications in more difficult musical terrain. For instance, a Strauss Waltz has obvious speed dynamics - the Viennese lilt(?) I think its called - where gradual slowing of tempo can be a very effective way to engage the listener.