I'm not sure how particular people are with their film grains, I'm not sure if anyone would be particular if they used a different type of film grain than the one they got Kodak to look into(i hope they didn't spend time and money on this- its grain for dog sakes!), but all in all, film great made for an interesting feel with Mass Effect. I like it because it just as a layered visual appeal to it, without it it looks too digital (where you'd pay more attention to bad AntiAliasing).
So Film Grain = Thumbs up!