I'm gonna go with Rouroni Kenshin. The best shounen I have read so far.
I've never read a better plot than that one.
What is uttered from the heart alone, will win the hearts of others to your own.
My vote: BECK.
(nobody saw that coming, huh)
And yeah, you can vote any shonen out there, wheter it's being serialized on a magazine or directly by tankobons or whatever. Check its Mangaupdates page to make sure it is a shonen if you have doubts about a manga.
And I was talknig about how he was emphasizing about how Oda is writing such a good story for so long. I know he voted for One Piece damnz sheesh :<
As long as it's shonen, it doesn't mind whatever the theme is
Sorry for the misunderstanding regarding WB's words, then