When you develop a personality, politeness is something that goes parallel. Be courteous and generous to make your personality shine.
Note that when a gentleman, who carries a dynamic personality is always too humble and polite. He always shows some courtesy towards the people.
If you get rude and misbehave, even though you have outstanding looks, you wont be counted as a person with good personality.
Being courteous is the way to win hearts and be a gentleman. When you are soft at your tongue and nature, your personality gets a double boost. How you behave with someone inferior or superior to you defines your courtesy towards that being.
Be well-mannered, be generous, be courteous. An overwhelming personality always carries a humble heart.