That's exactly how I see it too xD
Like my Maggie is happy to see me no matter what, while a friend's cat comes to be pet only when he needs to be fed... Opportunist!
I have two cats and they're the whiniest little things... I keep reminding them that they just moved in and are entitled to nothing. One keeps trying to get into the fridge!
They only tolerate us because they haven't figured out how to get by without us.