I’ll start: I love listening to the washing machine running. Relaxing, sounds like hard work I don’t have to do. Looking forward to the clean clothes and nice smell! Sewing machine sound makes me all giddy. Sound of my 1988 car engine.
I find chain saws and brushcutters extremely annoying. On some days in spring and autumn I can get quite grumpy about it, even though I rationally know they also save a lot of hard work.
I remember resting on the sofa and just listening to the hum of our metal frame Prusa. Especially when printing circles. I might want to have a 3D printer again for the sound more than its practical use!