6. Love Is What Makes Us Human
The Doctor isn't human. He comes from a completely alien and utterly unknowable culture. Their traditions and history are so different from ours we couldn't possibly understand. And even if we could understand, the Doctor isn't about to tell us about it. Given that, Doctor Who does what all scifi shows are ultimately about: proving that, as Star Trek put it "everybody's human." We can all relate to each other on a fundamental level, life to life. We can all connect with each other. So when the Doctor falls in love--serious, passionate, powerful love--or when he loves people like Amy and Rory, he becomes more human to us. He becomes more relatable, more understandable. And despite what some naysayers scream, there's nothing bad about a relatable character. A relatable character is one we can empathize with, one we can understand. Relatablility is what makes us human, and it's what makes the Doctor human.