I have the same prob at school, with people that give you a strange look when you talk about DBZ or other manga, but its just that (i live in Holland), its just not well-known to most younger generation over here, i watched manga when i was 9 years old, cause my brother loved those things, and when i compare manga to lets say spiderman or X-men the american cartoons, i find that the story`s and the originality has far surpassed those american or european cartoon/comic books/movies.
And the action is far more intense, if go look at the saga`s of Majin Buu of DBZ, the fightin in those anime is amazing even when its 10 years old.
though there are guys who like DBZ too and others who find it childish but i don`t care. the can kiss my ***!!!