It's an ok series, though perhaps a little too cheaty even for my trash tastes.
The MC gets to be a bad boy, but its ok because he's only doing eye for an eye with evil people and he can get along with good people once he gets past the "kill first, explain later" tendencies.
So points for not being completely antisocial, but the MC is still a near-invincible badass so the only question is how many seconds will it take him to kill the next set of mooks who pick a fight with him.