Just started watching her in Doctor Who
I must say she is my favorite companion so far. She is beautiful, she has a great body, she is a very good actress and she has great chemistry with The Doctor.
Rose was just ok, as was her mother and boyfriend. Martha was really good but they did not give her enough good storylines. And Donna was plain awful until one of her last episodes, where she was Doctor Donna. I thought she was great in that moment. Too bad she was so bad the rest of the time.