Continuing his first film's hot streaks, the 'Merc with a Mouth' returns more vulgar and violent than ever…but wow! It ain't without heart.

A massive departure from your everyday superhero, what does this 'Merc with a Mouth' let loose to make his debut film such a breakthrough?

I’ll admit it: for all its visual splendor, Avatar didn’t really click with me. But the reason why isn’t what you’d think. Confessing time…