Story: The concept is original, there's no doubt about it. As the title clearly states, each episode ends with "one punch". If you're freaking out right now because I've just given a major spoiler, then you'll be sorely disappointed when you watch the show, because it's mostly anti-climatic. BUT, that's the point. One Punch Man is parody and satire at its best. I've been told I have a cheesy kind of humour, so maybe enjoyment from this show hinges upon my kind of humour. I was literally laughing out loud watching this anime.
Art: The original manga was drawn purposely simple and lackluster. Upon its recreation, it was drawn beautifully and the anime as well, EXCEPT for Saitama's face, which is kept in its original comically plain state. At first, I doubted if I could watch a whole series with such a funny looking (and unattractive) protagonist, but I came to love Saitama, even with his stupid-looking face. And Saitama aside, everyone else is beautiful.
Character: You don't really get to know the characters very well, but they are all very interesting. There are quite a number of them but the story doesn't dwell on them individually. Generally speaking, you meet someone, learn their rank/abilities, and then may or may not see them reappear in another episode.
Enjoyment: Depending on your humour, you're either going to laugh along and find the whole idea brilliant, or you're going to drop the anime, finding it ridiculous. Personally, I enjoyed it and would recommend that you at least give it a solid try.
Bottom line: One Punch Man isn't for everyone. You're either going to find it funny or not. Try at least two episodes. The concept is truly refreshing and unique.
