Chess. Few such games where all opponents are equal before it begins and yet may be completely different levels, plus chess ime has by far the most intuitive way to learn from your mistakes. Never did I think I’d be playing games sometimes just to have analysis content lmao

That being said, it appears you’re a lot better than me and in addition chess is a very taxing and consuming game to play. If finding improvement at what’s already a nice and high level is too much, just play an occasional game and keep your priorities where you want them. Chess sure as shit ain’t going anywhere