Hyuuga Neji is considered the strongest and most talented of all genin. He is a member of the Hyuuga clan and masters Hyuuga-style taijutsu, the most powerful Leaf Village taijutsu style. Neji is a true genius and he knows it all too well. He is very confident (maybe even too confident) of himself and thinks he knows everything. He strongly believes that destiny is something one cannot control; it is given to you at birth and not even hard work can change it. Fully confident of himself, Neji is able to mentally destroy his less-confident opponents just by talking to them.
On top of all this Neji really is an incredibly strong and talented ninja. The combination of the Byakugan, Hyuuga-style taijutsu and the opening point attacks is perfect, and the fact that Neji has already fully mastered those techniques makes him a genius among geniuses.
After getting defeated by Uzumaki Naruto in the chunnin exam's final round, Neji's point of view changes. In fact, Naruto proved to him that hard work can defeat a natural talent, and that faith is not predetermined.