You can get really bad food pretty much anywhere (or none at all if you're flying Y within America), tolerable food (NZ Y, LH C) and really good food (EK C, NZ C, LH F).
I tend to self-cater if I'm on standby - fruit, shelled walnuts, a piece of good cheese and a bento box. Mostly attract envious looks from fellow pax who are picking at an undefinable piece of dead animal in brown sauce...