The Bipedal Bias: Why So Many Playable Humanoids?

Humans are a predictable bunch. Two arms, two legs, head atop the shoulders, front-facing eyes, opposable thumbs. Basic stuff. Same goes with most vertebrates. Us with a backbone to speak of will never have more than four limbs, excepting species with tails, but even then, it's only so much of a "limb." When you pull…