Story (9/10): The story is something i've never seen before, a man who has the power to destroy planets and even more plays as a hero for hobby, i think they improved in the plot, i liked the story because its funny and made me laugh sometimes, also me and my other friends who watched it can feel the hype growing in each episode.
Art (8/10): The art in the anime is great but in the manga is the greatest, some frames looks exactly like in the manga, i loved that, the final fight, tatskumaki scenes; but sometimes i didnt feel the same sensation when i read the manga because they kinda remove some cool animation sequences Yuusuke Murata did in the manga.
Sound (9/10): This is it. When the characters start to get serious, when they fight and all the explosions are just like "WOW OH MY GOD AAAAAAAA", great soundtrack and i've seen a lot of parodies of the OPM Opening, i sang it every time y listened to it (it made me yell, too powerful), the ending theme is amazing, i listen to it and its like to listed a soft song after an epic battle. If the characters voices can be here too, i'll say they were just amazing, great job.
Character (10/10): I and many people can identify themselfs with this one, i relate too much to saimata (many people can say the same lol), Genos is a great character and his purpose to fight is cool, Mumen Rider is the best, he is the average human, but he wants to be a hero and people know he may be weak but is putting 100% of his effort bringing peace to them, Sonic is great (the seiyuu did a good job on some phrases, quotes, etc). The first time i see variety of characters like Pri Pri Prisoner, me and my dad laughed to dead.
PS: I wanted to see more Fubuki ;__;
Enjoyment (10/10): I dont think i have much to say on this one, when i see Saitama or another character doing epic fights (Mumen Rider, Atomic Samurai, Bang, etc) gave to us. I literally jumped on my bed when i saw them fighting.
I think everyone who liked it wants a 2nd season! (and waiting for the OVAS!!)