Including the old series, who were your favorite companions? I think mine would be: Romana Leela Ace Susan (only because she was related to the doctor and was the first companion) Adric was cute And no one could forget...K9. All of them.
Although some might disagree, I really enjoyed Tegan and Nyssa. Sure, Sarah Jane Smith is probably the most beloved companion in Who-ville, but Tegan and Nyssa always stood out to me. It might be for the fact that Peter Davison is my favorite incarnation of the Doctor.
In order of adoration, here are my favorites: Tegan, Nyssa, Rose Tyler, Sarah Jane Smith, Wendy, and one fella, Jamie.
The new series has two of the best companions ever: Rose and Captain Jack. Simply due to her longevity on the show and her role as the first new companion, I would have to say that Rose is my favourite. If the writers and producers want to add a male companion to the show again, they ought to bring back the young guy who was featured in the first new Dalek episode. From the old show my favourite companion by far was Leela. I loved the rapport between the Doctor and her, and I understood his fondness for her when he referred to her as a savage. Adric, also, made an impression on me at the end with his final departure from the show. And, of course, how could I ever leave out K-9?
Sarah Jane Smith would be my favorite companion from the earlier series, but Donna is by far my favorite of the new ones. I'm probably in the minority, but Donna brought a lot to the series including comedy and a new perspetive, and it was a relief to see a companion that didn't spend most of their time trying to get the Doctor to be their boyfriend/lover.
What about the Brigadier? Although he never travelled with the Doctor, he was a true companion in the deepest sense of the word. He was always helping the Doctor, not to mention appearing with all but 2 of the classic series Doctors. He's my fav.
I never saw the old show (I know, I need to watch it), but my favorite out of the new show is most definately Rose Tyler. Her character was just so fun to watch and she had a chemistry with the Doctor that I just haven't seen since.
I don't know why but I always liked Dodo Chaplett, I think so much could've been done with her Character had the writers given her a chance. Some of my other favorites would be JAMIE(He lasted for a pretty long time) Ian Chesterton Romana I K9(How couldn't you? IM LOOKIN AT YOU TOM) Tegan Rose Donna Amy
The Brig is great and he did travel with the Doctor (twice) see THE THREE DOCTORS and MAWDRYN UNDEAD. It is sad that we lost both Nicholas Courtney (the Brigadier) and Sarah Jane Smith (Elisabeth Sladen) just last year.