dnovraD: Frankly, I enjoy the lack of social interaction a self-checkout can offer.
Definitely. If a machine that also accepts cash is available, I'll always use it rather than a manned checkout.
But on that topic, I've only seen those that accept cash at hypermarkets, and even there most are card-only, and yet all too often you have a situation with free card-only machines, lines at the few that also accept cash, and someone using such a machine, sometimes also having a pile of products, finishes scanning and then pays by card. FFS, there are free card-only machines, if you pay by card, go there, don't hold up the line of people waiting specifically for these few ones!