Repose and cheerfulness are the badge of the gentleman - repose in energy. The Greek battle pieces are calm; the heroes, in whatever violent actions engaged, retain a serene aspect.
In displaying the psychology of your characters, minute particulars are essential. God save us from vague generalizations! Be sure not to discuss your hero's state of mind. Make it clear from his actions. Nor is it necessary to portray many main characters. Let two people be the center of gravity in your story: he and she.
Character assassination is at once easier and surer than physical assault; and it involves far less risk for the assassin. It leaves him free to commit the same deed over and over again, and may, indeed, win him the honors of a hero in the country of his victims.