That's interesting. I'm thinking of Joel Spolsky's essay about little splinters in life and UI design. Basically that there's lots of things that are not quite bad enough for you to remember them, so you always expect them to work, and then feel horribly maligned when they don't, like the cupboard door. The gist was that smoothing those out makes a tremendous difference to your life -- even if I don't remember it afterwards, on the few occasions I get round to it, I think I get enough satisfaction from fixing something like that to be very happy.