I think all maids have a standard pattern of behaviour, just like those indian foreign workers. When my maid were new in our house, she was very obedient and ate most of the food we give her, which is the same as what we eat. We dun cook different for her. But now after 1 yr plus, she will tell us she wants to eat this and that. When my twins had leftover previously with chunks of meat, my mom would want to throw it away but she insisted she wants to eat - previously. Now, she just throws it away.
I think after some times, they will get abit smarter and starts to follow our lifestyles and know what is good and what is bad. I think this is normal. I think we can treat the maid good but we got to draw the line between emloyee and boss line very very clearly, got to remind them that they are still working for us as a maid. We can treat them good but never never break the line between boss and workers, then it will become very difficult to work together.