"I had little memories come back to me after the Game Station. They were why I didn't actually go back to get you, no matter what I told Rose." The Doctor paused, a wry smile on his face. "I was a prat in that regeneration."
He took a deep breath, his smile warming a bit. "You managed to find me at least once with each regeneration, at some point or another. There was always something to tell me I couldn't have. Other than your company in the TARDIS for a trip or two."