Game: Metal Gear Solid
What Makes Him Bad: Living as the "recessive traits" of Big Boss takes a toll on the guy.
What Makes Him Cool: "BROTHERRRR!" You just said it in Liquid's voice, didn't you? That's what makes him so awesome.

Being part of a family is hard enough, but being a clone and being told you will never be better than your twin is far worse. Still: Liquid Snake wanted to prove the people who created him wrong. He plotted against his twin to regain his birthright, thus proving his superiority. Even after becoming no more than an arm attached to Revolver Ocelot, he took control to prove that he was better then Solid Snake.