I can vaguely understand that, but much like the Doctors, I don't really have a favorite (or first, though I think it might be either Nyssa and Tegan or Jo), I generally like them all.

Well, one of the recent criticisms of Eleven's run has been "But the Doctor doesn't kill people!" by a lot of fans.

And the show-runners have been known to say things about the oldskool companions that were basically "all they did was scream a lot and break their ankles."