Money Shot is the best skill ever. I dual wield a pair of Torgue's Double Penetrating Unkempt Harolds with a build that focuses on increasing damage from pistols (I'm Your Huckleberry skill, Sheriff's Badge relic) and Money Shot (at 11/10 thanks to an Auspicious Raider Class Mod). The damage is ridiculously high and I love it! Has made me dislike the other classes, though, since they can't deal such amazing damage (except for melee Zer0, I guess).
The Gunzerker is my favorite class in the Borderlands series so far, by FAR!