The Doctor just grinned and squeezed her hand again. She was perfect, his Rose, and he didn't want her to change. He imagined that was part of the reason his other self had never attempted to alter her timeline. There was too much risk of something going wrong, beyond the fact that she would never have forgiven him for it.
"Anyone who doesn't like you is thick," he said. "Completely hopeless. You're brilliant. How many people can convince UNIT to help them after they've been hopping through universes? How many people can find a way to hop through universes in the first place and the gumption to do it?" He paused then, frowning. "Gumption. Not sure I like that word. Doesn't fit the teeth. Gumption. Gumption." He made a face and stuck his tongue out. "No. Never saying that again. Anyway, my point is, I'm right. As usual. You're perfect, Rose Tyler. Don't you dare change. I'd miss you too much, and the universe would be a poorer place."