Every self checkout I've used has a hand scanner. Scanning your own things is so much faster. I fail to understand why people whose job it is to check people out all day are so slow at it.

Then you get the customers that want to have a conversation with the checkout clerk. I'm sure the checkout person doesn't care that your grandfather has the same name and he was name after his great grandfather who rode the rails across the expanding United States in the 1800s.