How's this
On HK radar heading HK to Kaoshiung. Cleared to FL 370.
We ask "Request amended FL330"
HK Radar - "Standby"
He then comes back snappily "climb amended FL 330, and I would appreciate it if next time you get your company to flight plan you at the level you would actually like."
We didn't even bother responding to that stupid comment.
NB - the controller was not a gweillo.
Usually more than happy with HK ATC (particularly when the gweillos are on)