Before I make my review I will say to at least watch it once to do your own opinion.
The anime is decent enough. I have watched it before but I didn't get past episode 3 for some season so this is my second time watching it. One Punch is a weird show in my opinion but it has some entertaining moments.
From the first episode, I thought One Punch was a bootleg anime version of Superman but I was proven wrong. The anime did not make me hooked until Episode 5. I like the idea of a super strong guy who can take on any monsters and get bored after a while, to me, this part seems realistic because since he could do anything, it would get boring after a while. I have mixed feelings about this part because I think it's making fun of heroes but at the same time it isn't...but then again it's a parody of shounen animes/mangas.
Also, I like how the MC isn't as fairly attractive as other male characters. (according to my friend). The lack of hair could be a factor in this but you have to admit he doesn't look like regular male main characters. It's kind of unique to me.
My issue is I get that Saitama gets bored of fighting but the fight scenes were kind of boring. They could have at least made it interesting. There's hardly any drama or intense scenes, it just seems bland and I understand why because the MC is mary-sues but they could have at least tried to spice it up.
Overall the plot is alright, I was kind of disappointed because of how people have hyped this anime, but it was decent.