Any white woman put in a black body probably would spend most of their time preoccupied with the mysteries of black women's skin and hair like she was. Staring at her reflection/playing with her locks.

And an old decrepit man getting a new lease on life, nevermind a much more powerful body, would probably think sprinting and being able to cut wood in a single blow was cool as shit and made him so powerful. If L. Ron Hubbard could take over Tom Cruise's body, I could see him spending a lot of time doing the Tom Cruise run all over Los Angeles.

I would agree though that there should have been only two photos in the box. Make it seem like they JUST cracked the code and the grandparents were still getting used to their bodies but ultimately, that didn't bother me much. But I think it might answer your questions.