Regarding this Naruto vs One Piece sub-discussion, honestly i started watching Naruto earlier than One Piece, and I started my manga adventure with Naruto, but at some points it was so boring, so much pointless missions and fillers, that now i can't watch Naruto anymore, i definitly given up on it.
There was another anime that for me it has one of the best awesome history that I have ever seen, and that was Death Note, but unfortunatly, for me it ended at half at the history and i couldn't watch the rest (want to avoid spoilers for those that havent seen it) but for me it still is one of the best.
Really loved Hajime no Ippo, and hope that the Anime get started again as fast as it is possible, because i don't appreciate the manga that much.
Watched the first episodes of Bleach and Fairy Tail and died of being so bored, and given up.
But there is one Manga and Anime that fascinates me more and more with the time, I watched all the movies i hope i watched all the specials too, and that is One Piece, it has such a well written story, so much awesome characters, and not only the protagonists, also the bad guys are unique, I love that well build up characters, its like each character has is own life. Then, the humor makes start laughing at the beggining of a chapter and stop at the end of it, sometimes with some cry in the middle. And i think the most important is that we still don't know almost anything about this world, there is so much detail in it.
And this all makes me every wednesday, wait religiously for the next chapter, and after read it be impatient for the next one. And thats why it is number one for me.