IMO sasuke as a character is trash. Basically everyone that has ever helped him he has betrayed. He is incredibly self centered and arrogant. Loyalty is something I really respect and sasuke simply has none of it. He would kill his own brother if he thought it would make him feel better.... O' wait that already happened. Add the fact that he says he can solo then gets owned constantly, thereby needing his team and the fact he is bat-sh!t crazy, I often wonder anyone could have anything positive to say about his character.
Naruto on the other hand is pretty much the opposite, thereby embodying a lot of positive character traits that I enjoy. Hard work, confidence and fierce loyalty to his friends and village. It's a no brainier that I like naruto better.