One-Punch Man is one of the funniest shonen series around, full to the brim with great subversions and the like that are a joy to witness. Saitama is a great hero who became instantly iconic with his very first appearance, showcasing a level of power that is so astronomically high that its generally used for laughs instead of taking anything seriously. He's so strong that any villain who is giving the regular S-Class and A-Class heroes will be nothing more than chump change for him.