Heavy conversation bores; too light, disgusts.
Therefore, to be a good conversationalist you must be spontaneous, buoyant, natural, sympathetic, and must show a spirit of good will.
You must feel a spirit of helpfulness, and must enter heart and soul into things which interest others.

You must get the attention of people and hold it by interesting them, and you can only interest them by a warm sympathy--a real friendly sympathy.

If you are cold, distant, and unsympathetic you can not hold their attention.
You must be broad, tolerant.

A narrow stingy soul never talks well.

A man who is always violating your sense of taste, of justice, and of fairness, never interests you.