One piece is an anime series about a Pirate named Luffy and his journey to try and become the King of Pirates. Along the way he and his crew get into a lot of amazing adventures, like trying to save a kingdom from a criminal organisation, Going to an island in the sky, and many more!
People who hate on One Piece are pretty much the average "Anime Hipsters" you'll find on this site. A lot of people say the anime has gotten worse after the time skip, but honestly i'm still loving it, and if you're not bored of a series 550 episodes in then it deserves a 10/10 in my opinion. I definitely recommend this series to anyone looking for an anime with a lot of episodes. However, it does get slow at times, so if you're impatient it might not be for you as there are almost 1000 episodes.