General politeness and good manners:
* Polite
* Courteous
* Gracious
* Civil
* Well-mannered
Refined and sophisticated:
* Refined
* Sophisticated
* Urbane
* Elegant
Kind and considerate:
* Kind
* Considerate
* Thoughtful
* Gentle
Friendly and sociable:
* Friendly
* Sociable
* Gregarious
* Amiable
The best antonym will depend on the specific context. For example, if you are talking about someone who is rude and insensitive, "considerate" might be the most fitting antonym. However, if you are talking about someone who is clumsy and awkward, "refined" or "elegant" might be a better choice.