the fabric ladies at our local walmart are sweetie pies. every single one of them. they treat their customers like queens because (1) like i said, they're naturally nice folks; and (2) they know it's the customer traffic that will keep the department open ... we hope. i have also gotten great service in two other wm fab departments. and not-so-great service in one in southern florida.
i'm treated well when i shop at hancock's. i assume it would be the same at joann's if i could ever find anything there i wanted to buy. at least they always say hello and goodbye when i browse there.
and i've had some really great experiences with online vendors, too. and i've found a few i'll never shop with again.
point being ... sales people are ... well ... people. that means some are good folks and some aren't, just like you'll find anywhere else.