I think that game developers have more pressing issues than stereotypes and political correctness, like deadlines or make the game actually work.
Also i think that the art department in charge of presenting the game's content is much to blame, if we're heading into this direction.
Honestly, i will not buy a game where you have to raise ponies for marshmallow lucky charms, or have to solve mysteries along side of Scooby-Doo...
I will share one thing, i didn't buy Mirror's Edge because of the female Asian protagonist, i didn't buy it because the game didn't appeal to my tastes.
I love playing the Drunken Scottish Cyclops in Team Fortress 2. Because its fun, and i think the way he screams out loud there are "Bloody Spies!" around is hilarious.
I still play Assassin's creed, that's a good example of an unbiased characters, he kills Crusaders and Saracens as equals. Fun for everyone in my opinion.
Regardless of color, sexual orientation, and other traits, games deliver a story to engage the consumer in an experience, and the characters give it a little bit more depth so hopefully you are not only farming or hack/slashing your way through a game.
And nowadays there are notices that state the games are based on fictitious settings, circumstances and characters. I mean, come on guy, its just a game... i think that if you see too much into it, and begin taking things *too* personal, AND, by chance you might be missing the art of "parody" the problem isn't the game, it might be *you* mate.
Srsly,
Me.