I watched One Piece way back when it was first on Toonami.
I watched every episode up until they fought that Shark guy, and then I only bothered to watch episodes every now and then. So I know bits and pieces. I keep up with Naruto and Bleach. . .(Even though they're both starting to get a little ridiculous)
However, I noticed that One Piece has now become the most popular manga/anime in the world. One Piece never really got my attention, or appealed to me the way that Naruto and Bleach did