I had watched both naruto and one piece but I find one piece as the best.
Firstly, there are so many factors as to why One Piece is so popular.
1. Charismatic Protagonist - Luffy is cheerful, friendly and happy-go-lucky. He seems simple most of the time, but he's got incredible luck and intuition. He fights for friends and befriends his enemies (e.g. Mr. 3). He will never give up even when the odds are completely stacked against him. You'll want to be his friend; even better, you want to be him. The list of applications to his pirate crew must be pretty damn long.
2. Charismatic Supporting Characters - All the characters in One Piece have their own distinct personalities, traits and quirks. Just in Luffy's crew alone, you have a badass swordsman, a lustful cook, a cowardly ne'er-do-well, a cuddly deer-monster-man, a money-minded navigator, a cool and mysterious historian, a funky topless cyborg mechanic and a skeleton for a musician. How badass is that? That's only his crew; they meet tons more wonderful and diverse people who are all interesting and completely funny.
3. Wonderful, Fantastic World - The world of One Piece, like its characters, is diverse, unpredictable, and a joy to visit. It's like Alice in Wonderland, except that it's oceans of pirates and marines.
4. They Level Up The Hard Way - The Strawhat Pirates didn't turn into aces overnight. They have to resolve on determination, hard work, teamwork and ingenuity to overcome otherwise impossible enemies and scenarios. Often they get beaten within an inch of their lives. Mostly they already are. You can't help but root for them, unless you're cold-blooded. Or just jaded. Or if they are fighting a really cool enemy, you might want to switch sides for a while.
5. Romance Dawn - Nothing about love between two people. The entire adventure of One Piece is about the Romance Dawn - the heroic quest that sends the protagonist on an epic journey. The One Piece that Luffy (and everyone else) searches for is a real MacGuffin. This story is really about the journey, not the destination, and it's a really epic journey at that.
In short, One Piece is the quintessential shounen manga running at the time of writing. It contains all the essential elements of shounen manga storyteling; it's a Japanese bildungsroman of sorts. You follow the characters as they grow through hardship and happiness, joy and loss. It's often heartwarming and hilarious; sometimes it's heartbreaking. It's just a good story with good characters.
Deep Story Behind The Humor
The story of One Piece is often very humorous. But, it does have some very emotional & sometimes dark moments. Need some good examples? Read the Water 7 (Volumes 34-39) & Impel Down (Volumes 54-56) arcs.
Ninjas Are Better Than Pirates
Yes, this might sound a little silly. But, some people take this very seriously. A notable example would be Naruto. It seems to be more popular than One Piece to the younger demographic. You can credit that to the anime being shown on Cartoon Network in the West. Pirates are commonly seen in Western pop culture, while ninjas provide something different, foreign, and unique in the West. You can say the same regarding the idea of “death gods” (shinigami) in BLEACH, another popular series.
The Art
A lot of people can’t seem to get into the art style, both in the anime & manga. Yes, it can be pretty unusual. However, the art style is original and it stands out above a majority of manga titles out there. Not everyone wants all art styles to look the same, right? One’s personality can reflect his/her art style. Oda’s love of pirate comics and wanting to draw what he wanted is probably why the art is the way it is.
source:
https://www.google.com.ph/#hl=en&sc...1ca749ae62cabd&bpcl=35466521&biw=1366&bih=648
in short, one piece is a full package when it comes to overall criteria.
I hate it when hardcore narutards who did not watch both naruto and one piece
judge without analysis.