My pet peeve: people who take the opportunity of eating in a restaurant to make themselves feel superior by treating the staff as "servants." I was raised to always treat people the way I would like to be treated, and that includes wait staff in restaurants (my mother was a waitress, among other "careers").

So, if I am treated well, they should be treated as well or even better.

If I am not treated well, a word to the management is in order.

As to my fellow diners, the ones who are boorish, rude, demanding or insensitive are never asked to join me for a meal again!