I am sure I can think of a specific occasion, but one general thing that comes to mind is when you ask about something on the menu (like: what is this?) and the server doesn't know. Unless the person is clearly new at the restaurant, that gives me a bad feeling about the place. And it's even worse when the server doesn't even offer to try to find out for you.
Like your blog! Nottingham has some great bars. I haven't been to Copper City yet - most of my Nottingham nights out tend to involve Rock City, but we are always looking out for places to go before a gig. Welcome to Neeach!