I know I'm not the norm and this isn't going to change anytime soon, but I find the US-style customer service thing to be straight-up creepy.
The first few times I was in the US and a server or a reception desk person asked me how was my day in a cheerful way I was thrown all the way and actually answered, which then threw them and made me feel super self conscious. To this day when one of them approaches me that way at any point during the interaction I just wanna say "it's just me, you can stop that now, I just want a sandwich". It honestly makes the entire experience feel terrible to me. I kinda hate going out in anglo countries that do that.
I've even been to a few spots whose gimmick is "being rude to customers" as a gag and they're not rude, they're just acting like normal human beings who are at work and honestly it's much better. I don't need a man-servant, I just want to buy some food from you and for you to let me eat it there on the table because I don't have anywhere better to be right now. We don't have to make it into a whole thing.
My best friend works front end at our local bird hobby store and watching her turn from loud and excited talking with me to her customer service voice when a customer walks in or the phone rings is absolute whiplash
