Which is worse though? That or, at opening time, "got change for a fifty?" Relate to taxis too. If that's all I got I always let the driver know before I get in. If he's got a problem with it or hasn't got the change I get the next one.

For me too because I could never figure out the math and I’d get anxiety sweats

Over here, it's usually seniors fishing for change.

Regarding phones, I don't get the person who holds the end of the phone to their mouth, while using speaker. Hold the damn thing up to your ear too. I'm pretty sure that was the intent of the designers.

Oh god when they hand you a twenty, you hit the twenty button on your screen, it tells you the correct change, and THEN they start fishing around for change. **** off, you penny pinching ****.

Sure that's annoying but (at least in Holland) shops are usually short on change and giving them the right change is seen as a nice gesture. Is that a cultural difference? I appreciated it when customers did it, but I didn't have to deal with one of those cash registers which tells you the change or anything

It's a balance. If someone tells you that's 19.99 and you hand them a twenty, you're generally not expected to wait for your cent change. Similarly, if something costs 20.01 and you give them a twenty they're not gonna say where's the cent (usually). But if it's say 5.17 you're probably not going to hand them a tenner if possible: a fiver and then "let me see if I have the 17". Sometimes cashiers will ask you to give them the odd cents so they don't have to give you back notes. It's all about, I believe, when it's convenient for them too, when you're helping them. That's how it is here anyway.

The problem at the supermarket though is that there were usually several people in line behind them also trying to check out. Plus you had the store mentality of take your time and hurry up while they were cracking the whip. The supermarket industry in the US is a very high strung and sometimes dysfunctional one.

Standing behind someone while they write out a personal check was always a good time. There's the coupon clippers too. It's even worse when it's a digital one and the cashier has to grab the persons phone and find the correct one. For multiple items.

True. As a cashier I was expected to always give the exact change though, unless the customer was like 'nevermind' but they almost never do

Yep, this is familiar. We have the “take penny, leave a penny” coin cups as well for precisely this reason. As a barista I would never run out of coins but would often be short on single dollars, so would ask customers to trade them in for larger bills sometimes. There’s an unspoken alliance among food servers/tip earners, and arrangements like this are simply understood.