I like this. I would add that I think it's a process of iteration and not as categorical as it might seem on the surface. We live in a world of categories, and yet the most interesting and happy people seem to be the ones that embrace their categorical overlap — the ones that defy simple categorization because it makes the most sense to them.

So, I would say the bigger indicator of long-term success is how well can you move towards the hidden games that you are better and better at, until you arrive at one that only you can play. I'm sure it's possible to keep iterating from there, as well, even if it isn't necessary for happiness.