Customer lackness
The thing I hate when I'm standing on queue line on supermarket is when someone already in front of the cashier but not ready with the payment. So there she goes...open her bag, searching quite a while for her purse among a lot of stuffs inside her bag. And then spends quite a while to get the right money to pay from her psychedelic purse! And maaaybe, she will use all small coins she has so it will take another while to count the coins...
Come on, before you are in front of the cashier, you are in queue, you obviously have time to -at least- handed your purse already!
Cashier lackness
And don't tell me when its not many people in queue line! The happymood-cashier can be very dangerous person! She will have a sweet afternoon chit-chat with customer in front of her and ignore one or two people who are standing waiting for their turn including me!
I know maybe because they realize that the words 'customer service' or 'customer is a king' are kinda novel in Germany, they want to serve better with being nice and talkactive to customer...But not when other people on the line please...