Okay, I got this idea the other day, but I just don't have the time to write it myself, so I'm tossing it out there for anyone to pick up. Blink AU - Rose's traveling with the Doctor when they run across the Weeping Angels. For some reason, Rose is sent back to 1969 without Ten, only to run across Three who takes it upon himself to take care of her. By the time Ten manages to get himself to the sixties, he finds that he now has to fight himself for her attention as Three is completely besotted..
And something tells me Rose wouldn’t have a problem with this :3