I can understand why some people dislike shonen. If you don't like long animes, ones about friendship, about believing in yourself, that hard work might not always pay off, and people come and go. Then one piece isn't for you.
I started one piece around 2004(torrenting, asian friends, and 4kids). I first saw it on 4kids when it aired and that made me dislike the show at first. Now however I am in