I'm not much of a fast-food/burger person, even when visiting the US. But I do enjoy a BK burger once in awhile and loathe McD's burgers since I was a kid. My only attempt at getting a BK burger in China (BJ airport T3) was abandoned after they told me they could not make up a plain burger (meat-cheese-bun only)--due to dietary and preference reasons I can't eat burgers any way other than plain. So a potential customer was lost. I have not had this problem at BK in Malaysia, Thailand, Incheon airport, or any other place I can think of where I wanted to try a BK local version and put in the request for a plain burger--everywhere else it was always fulfilled promptly and deliciously.

ETA: Am now in Thailand, and in honor of this thread, went to local BK today to tickle my taste buds. The cheeseburger was mighty fine, am happy to report. Maybe Thai BK crews should be sent up to China to show 'em how it's done?