I've been thinking about the concept of fun and something I might like to do in a game soon. The concept I'm poking at involves basically putting the player to work. Mop this, paint that, repair this other thing, sort these things, figure out what's wrong with this bit and fix it...
There are no scores, nothing to dodge or shoot or jump over. It's relatively mundane except for the setting. My thought is that there is satisfaction to be had doing discrete jobs well and seeing your work matter... sort of like watering the crops in Stardew Valley.
My suspicion is that it will be somewhat meditative, relaxing, and satisfying to accomplish things, especially since doing these things will contribute to a massive fictional infrastructure project which will basically serve as the game story and backdrop and metagame.
Do you have examples of 'boring' gameplay that worked really well for you?