Wh40k: "A go-ood guy? Is that some kind of food?"
Thinking about this joke made me realize that every faction in 40k seems to agree that humans are tasty and nutritious. From imperium corpse starch, Kroot, Tyrranids, Drukhari's suffering-as-sustenance thing, demons, and probably more, I think the only faction utterly disinterested in eating people are the Necrons.