I never took F on this route but HKG-BKK is a 'shorter' intra-Asian route than others such as HKG-SIN or HKG-NRT.

I find business class services on HKG-BKK to be 'simpler' than those offered on other intra-Asian routes.

I definitely go with christep's idea of getting breakfast in the restaurant at the Wing or the Pier F section.