Aside from the instruments you are already in various stages of learning, what other ones do you really want to learn? My own current wish list includes concertina, hammer dulcimer, harmonica, harp, and bouzouki. (I am, of course, completely ignoring the question of how many instruments one can realistically learn to play (decently) in one lifetime. --- not to mention the cost of all those instruments!) But if you could learn your whole future instruments wish list, what would it include?