and then I remembered this (though I'm sure you were already thinking of it)...

The Doctor: Do you want to die?
Jack: This one's a little stuck.
The Doctor: Jack.
Jack: I thought I did. I don't know. But this lot—you see them out here surviving. And that's fantastic!
The Doctor: You might be out there somewhere.
Jack: I could go meet myself.
The Doctor: Well. The only man you're ever going to be happy with.
Jack: This new regeneration, it's kinda cheeky!