Speaking as someone who worked cash as a teenager/young adult, no we don't want to fucking talk to you. I was there because I liked money and that was a reliable way to make minimum wage. That's it. I didn't have a passion for scanning items and asking for payment. I had tuition to pay and debt racking up. I wasn't there to chat with you, or improve the customer experience. I was there to get paid and I can tell you that most if not all of the other cashier's were in the same boat.

People get more sociable the closer you get to the equator. This is reflected in the distance from which people talk to you. So in the southern USA people are very chatty and will talk about pretty much anything while basically sitting on your lap, but in Norway you'll pretty much just shout across the fjord at someone to tell them their house is on fire if you're in a talkative mood. Talking to cashier's doesn't happen anyway.

Only time I had cashiers wanting a chat is if there is no queue otherwise its "Hello" and "Have a nice day"

I'm faster.

You have cashiers that wish to chat?!

The cashiers at the store across the street (that has no self check out) will talk your freakin' ear off. There could be 1 person ahead of you with a single item and it takes 'em 15 minutes to get checked out. 😬