Antagonists are just people. Er, unless they’re insane sex-bots, sentient washing machines, serial killer dinosaurs, or hyper-intelligent window treatments. But even then, we need to treat them like people. People with wants, needs, fears, motivations. People with families and friends and their own enemies. They’re full-blooded, full-bodied characters. They’re not single-minded villains twirling greasy mustaches.