One Piece is honestly the most amazing series I have ever watched or read. The plots are well-written and hold my attention without taking themselves too seriously and adding unnecessary drama that causes me to lose interest. The characters are some of the most endearing, well-developed and likable characters and the art, while not appealing to me at first, took a grand total of TWO episodes to get used to before I found it to be incredibly unique and my favorite anime art style to date.
While this series has serious moments, it never stops being funny. Something important about the humor in this series is that it's ORIGINAL. None of the typical jokes that are recycled in every anime and even the serious moments I was talking about are sprinkled with clever and endearing humor that keeps me watching.
Something that is important to me in a series is the characters. If I don't like characters, chances are, I'm not going to like the series. The lead cast to One Piece has won me over in their own individual ways. There is not a single one I don't like and I seriously thought that was IMPOSSIBLE.
I could go on and on about this series but it's not my job to tell you EVERYTHING great about it! Just take my word on it!