UMM... I liked Neji's antagonistic style because at that time he wasn't only strong (i mean, for Naruto and co.'s level), but he was also clever (not as much as Shikamaru but clever enough as to be considered calculating) and he was really cruel! He used to go on mental attacks to weaken (or definitely destroy) someone's will (and the worse, he was always right) . Let's be honest, you have to got a good eye

to do it right and properly. He was not saying just rudeness to hurt you, but he was indeed analizing your soul to find weak points and destroy you!
He was also somewhat sadistic (Who else but a sadistic man would enjoy by humiliating someone you don't even have a grudge against?) narutobase.net/manga/Naruto/099/19
Plus he was full of hatred and somewaht despair (Naruto even compared his eyes with Gaara's)narutobase.net/manga/Naruto/098/7
I think if he had follow the right path XP he would have been a great and badass antagonist:noc: