Totally with you on the 'ordinary people' issue. It's also annoying that Rose was able to breathe in the heart of the TARDIS and go back to normal afterwards, while Reinette was able to look into the Doctor's mind and comprehend what she saw there perfectly easily - while Donna must be thrown back to ordinary obscurity by the whole experience. I'd at least like to have seen her choosing that existence for herself - perhaps even knowing before she ever became the DoctorDonna that that was going to be her fate if she did, but still doing it anyway to save the world.