Art: The art for One Punch Man manga is drawn by the fantastic Yusuke Murata, and the anime does a pretty admirable job living up to that. The action sequences especially really wowed me, and sometimes the sheer dissonance between Saitama's simplistically drawn chromedome and the imposing figures of his enemies can be pretty fantastic.
Character: The characters of One Punch Man all have varied and good designs. Genos and Saitama, as the mains, look amazing, and they're very likeable in the show. The monsters look awesome, in my opinion, and the other heroes are cool just because they all appear to immediately fit into one archetype or cliche, and you get to watch whether they fit it or not.
Sound: I'm no expert on sound design, but One Punch Man sounded fine to me. The theme song is awesome to get yourself fired up, and though the dub just has one episode out so far, that seems pretty amazing as well.
Enjoyment: If my previous glowing praise hasn't tipped you off, I love this series. SO MUCH. I watched it with my 13-year old sister, and she loved it as well. The action is fun to watch and the comedy is hilarious. In the moments this show gets serious, it does so in a way that's genuinely touching. I'd highly, highly recommend this series to anyone that thinks they might like it even a little bit, as it is literally one of my favorite pieces of media ever.
