My pen-n-paper RPG characters were inevitably lawful good, and I even played as a Paladin in Diablo 2 not because of the class's ability, but because that's how I self-identified as a gamer.
It's difficult to overcome that inbuilt human need to be agreeable, and in every previous game where I'd been offered a moral choice, from the Atari days on, I'd been the pinnacle of goodness. It's a notable game for me because though I've been playing video games since about 1982, it's the first game where I was able to force myself to play as a bad guy. It's almost eight years old and can at this point rightfully be called a classic-if you haven't played it, you're either a baby gamer or you don't like CRPGs.
Knights of the Old Republic is the archetypical modern Bioware RPG-you've got a mission to save the universe, a squad full of emotional basket-cases whose problems only you can fix, and a bunch of different places to go to gather Maguffins to move along the plot, each place stuffed with sidequests galore.
