I know I'm a bit late reveiwing season 1, but here it is.
One Punch Man: Season 1
I haven't watched season 2 yet, sorry.
Saitama, defeats enemies with one punch, but yearns for a real fight.
This is a loving satire of shonen fighting tropes.
A great cast of characters, epic action, and creative enemies keep the running joke from getting old.
It's great for multiple watchings, too.
One Punch Man
A hero... for fun.
'Till next time, later.