I am studying/learning/practicing/playing t'ai chi. It is a very non martial arts kind of t'ai chi, and is more like a moving meditation than anything else. Chinese line dancing is another way to describe it. I feel that it includes the qualities you mentioned, Vital, Absorbing, Creative, Interesting.
It incorporates a mindfulness aspect in that focus and concentration on the moment is essential. Its nature encourages treating the self with acceptance and compassion and these are proving to be a good fit with my life needs now. It is also open ended, with no limit to understanding or competence.
While being treated for depression, I was encouraged to perform an activity that requires and creates mastery, and that definition seems to overlap with VACI, if I understand the concept correctly.
While I don't attend SMART meetings or take instruction, I like many of the ideas and use them anyway.