I really wish the character of Sam was Caucasian
Which is a strange thing for me to say, I am not racist at all, but the problem I have with the casting in this instance is that I don't buy him as either the love interest of someone who looks like Annie Murphy OR as an alcoholic.
Heck, I don't even know how likely it would be for a guy like that to want to own a diner!
It's obvious they stuck an Asian in there purely for diversity, since all the principal characters are already white, but in my opinion this casting choice just doesn't work at all. [shrug]
If anything, they could have made the neighbors Hispanic or something.