It sucks because a lot of people don't really give one piece a try either because of it's art or because it's too long. I find the latter funny because despite those who say it's too long still read other long series such as naruto or bleach.
I don't really care if it's underrated or overrated by others. It's the best manga in terms of story, adventure and comedy for me. It's ahead of Naruto but that's me. Others may think differently.
We as fans just can say we found a long lost treasure called One Piece series among other series available.
Be lucky that not many people out there know its awesome existence so we can have this treasure exclusively for ourselves.
Simply put, i stay loyal to One Piece until the end. Keep going, Oda.
OT: The manga is some what underrated here in Canada/US but hell no in Japan. As for the anime, it's pretty bad as of recently but I'm assuming that's the case because of how much it must of costed them to produce/animate the 3D2Y special. The OP anime needs to go on a filler arc (about 20 episodes) which is unlikely.