I've been watching anime for years and I don't see why anyone would want to watch Naruto either.
Anyway, it's often the case that the best way to make a person hate anime is to keep hounding them about it. If your brother currently shows no interest in anime, leave him the heck alone. If he's curious, dig up some titles based on his tastes in movies, books, or tv shows.
Just blindly asking titles to suggest will get tons of responses, but won't really help your cause because we know nothing about what your brother likes beyond his acceptance of the show Avatar.