It\'s cool, some people prefer mouse/KB support on FPS\'s some don\'t. ME, I really don\'t care I have fun with both, I play all the Rainbow Six games(name one I got it) on PC. I could never dream of playing any of these with a controller. However, I\'ve played many FPS\'s on many consoles and I have no problem adjusting. It\'s easy because the game is designed for controller play. Just as PC games are designed for KB/mouse play.
It really just boils down to prefrence, and you can\'t knock someone just because they prefer KB/mouse and you don\'t. Halo is an excellent game, and yes it would suit some players to have the KB/mouse option, but also many people are happy with it the way it is. So again, it just really boils down to taste and prefrence.
I say whoopdie doo!! Play what makes you happy, and don\'t play what makes you unhappy. It\'s really just that easy.