Well, I've always thought having "big-breasted bimbos" in games isn't really a problem, due to the fact that, well most games, like racers, many FPS's and strategy games, not to mention many others, don't actually have any.
Most of the games that do, are multiplayer, and the female characters are included for girls. I dislike playing as girls, especially "bimbos", as they make me embarassed on behalf of my gender just looking at them, and I think many men feel the same way. On the other hand, the developers of the game have to include female characters, otherwise they're being sexist. In games such as Quake, there is little or no background to the characters, so it's impossible to make any of the female characters intelligent, the only thing they can make is their appearance, and just as men like playing as big muscular characters (what men think that women percieve to be "the ideal man", they naturally do the same for women, they just assume that a women's picture of "the ideal woman" is the same as a man's, hence the bimbo.
Just my 2 Cents, anyways.
Confusing, but wise, words of the Corsair:
"If you give me £10, then you will have £10 less. Or do you?"