I actually complained about this on the board a few years back. We had been in Tanzania on safari and came back via Dubai to pick up QF2. We rather crazily did it all in one go, so by the time we boarded QF2, we had been travelling more than 24 hours non stop and I was half dead, so I told my FA (a very charming man), that I just wanted to have a bowl of soup and go to sleep. Full marks to him for getting that immediately, making up the bed and I was fast asleep really rapidly.
The problem arose when around 6 hours later, I woke up very hungry and went to the gallery to see if I could get some food (I am also one of the people who hate pressing call buttons, apart from which other people were asleep, so I didn't want to disturb them). Anyway went to the galley where a FA was holding the fort and asked if I could get anything to eat. She offered the steak sandwich and I really don't like them, so asked if there was anything else and she said no in a rather huffy way. I suggested perhaps some cheese and biscuits and after a fairly long pause she said she supposed she could and started getting out the cheeses and cutting some pieces. Fair bit of attitude though.
It was fine, I am not a big eater (although I love food), so cheese and crackers and a cup of tea were enough to tide me over to breakfast, but I was a bit miffed that at $12,000 pp, they couldn't make a bit more effort. If I was in the same situation again, I would request that something be kept for me when I woke up, but I feel I shouldn't have to. Others have said they have had meals kept for them, so clearly some crews are more proactive than others.
This sort of thing is one of the reasons I am now trying other carriers, after being solidly Qantas for so many years....