I wish I could be like that. I'm more or less a result-driven person, but whenever a result is achieved (e.g. complete all xv6 labs) I became lost and frustrated, and was eager to find the next one. But my mind was usually burnt out during the previous process, so it usually takes a few months of frustration to get everything settled so that I could move on.

The "pinball" concept in "The Soul of a New Machine" rings very true to me -- "The motivational system is akin to the game of pinball, the analogy being that if you win this round, you get to play the game again." -- this is exactly what I feel. But the pinball game is more and more difficult, sometimes too difficult for my fragile mind -- and I still have a day job and a family to take care of.

Same here, I guess this mode caters to specific type of personality (not obsessive about goals, achievements, not constantly comparing against others - at least I am none of those).

I like going to gym for past 15 years, it feels great to do some free weights. Not destroy myself, just a good workout. Body adjusting/maintaining not-a-bad-shape is a nice bonus.