I will buy that part of Ten IS in love with Rose in a way he isn't with Martha, and that enough of that was in human!Doctor (who was non-Time-Lord enough to actually be able to TELL HER he loved her) that they've got something to work with. No matter how unhealthy it is, Rose needs the Doctor. Martha doesn't need a copy of Ten to drag around as a constant reminder of the fact that he doesn't love her; besides, she's doing a good job of moving on. And I am SO CHUFFED that she'll probably be a Torchwood regular next season, if only because we might get to see more of Tom. (Though if Tom becomes Rhys Mk. 2 I will PUNCH SOMEONE.)