I like big birds. Female emus/rheas/ostriches can be like affectionate cats. If that ostrich steps on my foot she'll break every bone but all she wants is scratches. I'd never interact with a cassowary the same way I can with any of them. Wouldn't get in an enclosure with one, wouldn't try to scratch its weird turkey-ass neck, if I saw one in the wild I'd treat it like a bear/moose and nope out of the entire area.