My enjoyment is shifting from this to having a well designed, tested, good looking, and very usable hobby SW, with features I need and can play with or do fun or useful stuff with. :)

I can also work on very fun things with computers now, that I'd just not even think of previously. I just love the idea of the program, but I'm not interested in learning details of how to implement it. Last such thing is teaching computer to dance and improvise Bachata to music. :) Yeah, I can spend months on details of 3D, or physics simulation, or skeleton animation, or things like that, but that's not what I'm interested in. I'm interested in the dance aspects itself and matchin to music, and lead-follow simulation (where the computer plans the lead actions to some extent, and follow is just a reactive machine with some degrees of impovisational freedom) and all the details of how the actual skeletons are visualized on screen I literally can care less about. All I care about is impairing knowledge of freedom of movement of lead and knowledge of freedom of what can be led while hands are connected or visually by what follow can observe and lead can signal through intentional movement, and not how the program will execute this.

Nothing like that existed previously, and I would not be able to get to fun interesting things without wading throught shit ton of uninteresting parts. But now I within a span of 24 hours have something that I can have a base implementation of a 3D dance lead/follow emulator with weight transfer, balance skeleton joint lead-follow hand connection weight trasnfer and ground connection based emulator that I can paly with emulating the dance on top of, and I can focus on the actual dance/music conenction, and tiny details that make the emulated dance look fun, surprising, natural, and fit Bachata style and playfulness.