Charlatan

Personally, I've never liked the term classy. It just seems that people are aspiring to act like a class to which they don't belong (i.e. the upper class). I've never been a fan.

Rather, I thing other have hit on what you are truly after, manners. Be polite. Be courteous. But be yourself. There is nothing worse than seeing someone trying very hard to be something (someone?) they are not.

__________________
"My hands are on fire. Hands are on fire. Ain't got no more time for all you charlatans and liars."
- Old Man Luedecke