He's smug, arrogant and so unapologetic with it.
What is not to like about this guy? He's hilarious. The writers have made it quite clear, as has Lyndon Ogbourne, that Nathan is better with words than his fists and he plays dirty by relying on his mama and papa's cash.
It's going to be very good when he realises he's not the eldest child, that his whole family has been built on lies and that he may have to work for his fortune.