Her obvservation humoured him greatly, and he smiled to himself as he proceeded her to the console. "Helps with the dancing." He flipped one of the switches beside him, not for any particular reason. Just because he could, mostly. A clanging sound echoed away from them as a result.
"Busy!" His tone was incredulous but not lacking in mirth as he moved around the console, continuing to fiddle with things as he did. "Busy, she says. Rose Tyler, you have no appreciation for good interior design. I read an article that told me all about maximising small spaces," he added with an air of complete sincerity, flopping into the chair to his right. There was something so strange, having her standing there again. Calm as you please in the TARDIS. Not bad strange, per se. Just...strange. It had been so, so long for him. But that didn't mean he didn't remember that time vividly. He always remembered, whether he wanted to or not.
"So," he asked, making eye contact again. "Last thing that happened to you before you got here. Go." It was before his regeneration, that much was clear. But how long before? He had some theories, and he wouldn't have minded having them confirmed.