Besides optimization to a platform, why care about exclusivity?

[menx64]

as a nintendo only console/portables owner (XD) I say identity... I know there are a lot of good games on other consoles but I dont really like the PS3/360, I have a gaming PC (mostly for RTS) and a psp (MH) too, but other that that I dont fell like sony or microsoft cannt provide me the kind of games I like. I am not trying to be a fanboy, but I only go with nintendo and I feel happy with my choice.