The Doctor has a great deal of admiration for humans; they’re one of his favourite sentient races. They’re very primitive by galactic standards of course, still in their infancy really, but as a race they’re curious, adventurous, and inventive… They make a lot of mistakes, as the very young are wont to do, but they learn from most of them.
They have a tremendous capacity for stubborn determination too. It they build something and it gets knocked down, they don’t just give up; they build it again, bigger and stronger, until it stays.
Some day, humanity will achieve great things.