Not a lot of people notice, but One Punch-Man is also an excellent superhero critique/satire. Kind of like The Boys, another superhero satire, the highest ranking heroes are similarly douchebags and self-serving, and cause a lot of destruction in their heroics. Unlike The Boys, One Punch-Man focuses on what it means to be a hero, and despite being the strongest person, Saitama, the protagonist, is not the best hero he could be, which leaves him room to grow and develop as a character. The point that the manga is trying to make is evident through strong heroes who act in self-interest instead of empathy, and weak heroes who would put their lives on the line to save the innocent, no matter how strong the enemy. World building, character design, relations and actions reflect this as well.
The story gets very introspective at times, and Saitama has quite a few "Guts moments". Whether you're coming looking for a fun, enjoyable read, or a complex, contemplative one, One Punch-Man will leave you satisfied.
