i always treat crew as i would like to be treated.
We are low cost, so no chance of upgrades, and everything is buy on board, but even so. I will still give a bottle of crew water and when im making a cuppa for us and F/D i will make the travelling crew one aswell, its just common curtesy.
ALthough when i am travelling as a pax, i dont make it known im crew, and i think other crew should be the same there is nothing worse than a pax getting on and informing you they are or used to be crew, and "expecting" things.