Whenever a character is shown drinking wine, it's usually a good sign that person is high class or sophisticated. The connotations of this can vary depending on the person. For protagonists, wine knowledge can show that the character is An Officer and a Gentleman or a Gentleman and a Scholar, and serves to make the character look more worldly and refined. For villains, wine features prominently in introducing A Man of Wealth and Taste, often sporting A Glass of Chianti. Either way, wine drinkers will almost always be Blue Bloods or obsessive snobs who take it way too seriously.