The worst customer service I can ever remember observing was in the US (LA specifically). But I've had indifferent, sloppy and excellent customer service in eve

The worst customer service I can ever remember observing was in the US (LA specifically). But I've had indifferent, sloppy and excellent customer service in every country I spent long enough in to observe it, and the US was the only one where not tipping is considered some sort of faux-pas by the customer.