While I agree that Pechorin lacks virtue, he seems to be somewhat of an idealist. He seems to admire virtue and and dislike vice. Though he excuses it in himself, he still tends to identity it in a negative way, calling it vile or some such. He also despises lack of virtue in others. However, this doesn't show as easily because he also places value on people according to amusement value and intelligence. He especially dislikes falsity, implying a liking for truth, despite the manipulating and deceiving he does. The interaction between his beliefs and actions are very complex.