If you're a fan of anime series, well I guess you better to include this One Man Punch to your watch list. At the fist, Saitama is really a bit boring to me. Seeing him in his facial expression in some scenarios of unexpected things is only a Huh! for him. I can say "WTF" for fighting monsters or aliens to protect the City. Well, what really amazed me is that finishing a enemy in a one single effortless punch.
You can watch the full episodes too in iTvAnime and see for yourself.