The thing I get most out of mowing lawns is a kind of brain-off satisfaction in manual labour. Although actually not, because if you're mowing a useful sort of lawn you'll be using something with a motor and whirling sharp things and you'll either be paying attention to that or looking in the long grass for severed body parts. Also you'll be paying attention to the fuel-air mixture or where the extension lead is relative to the whirling sharp things, where small and darting animals and/or children are at any point, where the edge of any mower-consuming steep drops might be, what metallic and/or concrete objects might be hiding in that patch of long grass and your dogshit radar, largely unused while the Party of Labour were in power, will be on maximum gain.
I think this means that one's brain isn't off, it's just not thinking of bloody Ruby or bloody servers or bloody 'git log -p'. However, I was having fun mowing lawns well before the invention of git, Ruby and the development of the x86-64 server architecture as we currently understand it. Thus it's probably not that.
(What was that horrible 'competitor' to MCA with two-level slots and the requirement to configure each card from its own setup floppy? God. Remember when you had to put extra things in computers to make them do something useful? That was shit.)
I think that there's something quite pleasing about orbiting a patch of scruffy ground with a whirly sharp thing and replacing the scruffiness with an abstract figure within which there is order. Or if not order, then a marked change. Given my background, you may see also grain harvesting or ploughing.
I should also note that a rectangular lawn carefully rendered stripy by carefully going up and down, left to right is absolutely no fun at all. It's just suburban, or posby as Ma would have it.
Ironing's another good one. Also properly indented code and sensibly ordered files. Although those things don't feel anything like as nice.
What I'm attempting to get at is that I have no idea what this thing is or what to call it. It's just a thing that I imagine is Just Me. In some ways, I don't want to think too hard about what's going on, just in case it loses its magic.