I liked the concept at first, but now it seems like a devil fruit grows everywhere. I do agree that the abilities of the different types are unique. I like the fact that you need Haki to even touch a Logia type.
I'm going to take this to VM so as to not flood the thread with pointless posts of comparison. I apologize as well because my reaction could have been better. I just feel that in One Piece, everyone has a devil fruit now and it's no longer cool and unique. I remember first reading it and not many people had one. I think the second character to have a devil fruit was Chopper and he wasn't introduced for a while. Again, my opinion. My favorite manga isn't even like One Piece or Naruto.
My favorite manga is Detective Conan and I've read a lot of manga to know that Naruto is far from being the best. The fights I've seen in One Piece have characters like Nami and Robin just getting destroyed lately. I guess that's why I loved watching the Pacifistas murk the Straw Hats and a lot of the Supernovas. I suppose I just feel like a lot of the abilities in every manga like this (not just One Piece) have become generic and unoriginal. Unless your Law and in that case you're a badass.