A gossip is one who talks to you about others; a bore is one who talks to you about himself; and a brilliant conversationalist is one who talks to you about yourself.

Lisa Kirk (1925-1990) American actress and singer
Quoted in the Cholly Knickerbocker society column, New York Journal American (9 Mar 1954)
    (Source)

In that Heart paper at that time, Cholly Knickerbocker was the pen name for Igor Cassini.