I don't want to go.

That scene was brutal. I cried like a baby. And it so encapsulated Tennant's doctor, his sheer joy in life that kept him going no matter how bad things got. It also drove home the weight of a doctor that loved a human, and became friends with one in a way he never had before.

To me, there's no bad doctors at all, only varying degrees of greatness. But Tennant is the only one that can match "my" doctor, Tom Baker. Everything about his run just worked for me. So, that scene? Perfect, andb the quote itself is the distillation of that .