Ditzyboy
I'd ignore the unnecessarily rude comments from a few of the posters on this thread. They probably don't fly QF anyway - just want to stick the knife in.
As a mere passenger I appreciate very much the job done by the cabin crew. I always make a point of a friendly "hello" when I board and to those stationed at their respective positions as a trudge my way down the back. I also thank the crew on disembarking. I have also, on occasion, written letters of appreciation for that little extra that I may have experienced. I have no idea, however, if the crew ever get to hear of those commendations as it usually results in a "form" email response but I do it anyway.
Thanks!