Rose Tyler, the way she treated Donna makes Rose that much more special.
I think the reason so many people didn't like Martha was because she was interested I the doctor. Donna would have been a better companion for the doctor after Rose because she was going to get married and didn't have feelings for the doctor.
Doctor Who..Ten and Donna.... Doctor Donna...David Tennant and Cathrine Tate
Donna and Ten. My favorite pair.
Thanks for the feels, internet, thanks for the feels.