Team sports aren't my thing. I find it easier to pick something up if I can do it at my own speed. And you don't need a partner to go running you don't need a particular place like in tennis just a pair of trainers.
The waltz can be sad and at the same time uplifting. You have to see life from both sides and the waltz encapsulates that. If you're in my audience you give yourself to me and the waltz will grab you.