Re: Is OP worth reading?
One Piece has soul. Out of shonen manga, it's the best. Naruto is shit, Bleach is shit. However, shonen manga is a demographic for kids from middle school to high school. Authors writing shonen manga are catering to minors, and therefore have limited content.
Better manga is written for adults, i.e. are seinen manga. Like Berserk.
Also I'm pretty sure your friends are too stupid to appreciate underlying themes in a story, or have no idea how to suspend disbelief. There's more to a story than battles, plot, and characters.