If you have already watch one piece you know that Luffy is a pretty good MC (Main character) he is very charismatic,very kind with his nakamas (nakamas means his crew) and the best captain ever he always exceed his limits just because he want to protect his nakamas,also protect his dream/goal is to become "THE KING OF THE PIRATES" have you ever hear a better dream/goal?.
zoro is one of the best side characters in the whole anime world, why? have you ever hear in another anime that the side characters has their own dreams? no right this is one of the unique animes that the side characters has their own dream for example zoro's dream is to become the best swordman because he make a promise to his friend, Sanji's dream is go to the all blue, the all blue is an ocean where very kind of fishes live.
As we know every weekend came out a new One piece episode it means One piece haven't finish yet and like that it has one of the best story's because it has happy,sad,epic and exciting moments it means when the anime finish, the whole comiunity think is gonna be one of the best anime ever.
Usopp is a side character and is very love by the community because he is one of the weakest chrarcters in the whole verseof course he has his own dream as well his dream is to become a brave sea warrior and i know he is gonna make it because He is getting stronger but he is improving at a rather slow pace
One piece is one of the best animes ever but you dont have to trust me you can search in google or ask many people as you want but is no only good for the story the side characters are pretty good too the villans are pretty good too, when the story has sad moments it make me cry so many times, when the story has epic moments you can feel how epic it was, when the moments are happy you can feel the hapyness runing for your veins in a few words if you dont have anything to do watch one piece if you want to watch another anime watch one piece if you want to invest your time in something good wacth one piece