I despise working self-checkout.
It's utterly boring, and I get pissed off at the people that walk right past the machines to me, standing at my terminal and expecting me to check them out.
If they have something difficult to scan, or one tiny-ass thing, I'll usually do it, but most of the time I just say, "Oh, this is self-checkout," and point to the machines.
You'd be surprised how often they look shocked, like they completely missed the talking machines when they walked past.
I've even had morons stand in line right next to the fucking machines expecting me to check them out. I don't like the self checkouts, but they have a purpose, and that's to keep me from having to deal with your ass.
--Home Improvement Whore