I hate how self-checkout treats me like a child and speaks and prompts me a zillion times for things I don't want. How many bags do you want to buy? None, because I have mine like 90% of people, geez. How about a donation? Unexpected item in bagging area. TAKE YOUR RECEIPT. Nooooo
And it even SPEAKS. LOUDLY. It burns through ALL my patience within seconds.
If it just let me scan my stuff having me tap on a touchscreen, and then just let me stay the payment machine in a single touch, and it were silent ... I might tolerate it. Otherwise, get back, demon.