Only a humble groundie
But if acknoweledged by the Crew, will ask if standby, or any discounted ticket, they look after the fare paying passengers first. Just greatful for the seat and to be getting from A-B. No upgrades, no food, but then I tend to travel short-haul if at all. The crew can always ask at the end of service 'sure we cant tempt you with the fish, it is all we have left and it will only go to waste?'
A question though, to those who position in uniform. Last time I worked passenger, this was a strict no no on my airline, unless you were type rated in your capacity with the carrying airline on the aircraft type.
Bored.