It's a great anime with new concepts which venture into to the new meme subculture of the internet. What's so appealing about this is how it differs from the old cliches where the protagonist struggles, overcomes the odds and with the courage and willingness to save the day overcomes his enemies. One Punch Man is the exact opposite of that. It has a more realistic approach to the story which flirts with the idea of how would superheroes would be like if they existed in the real world which is quite innovative.