I have enormous respect for Martha Jones. Unlike Rose, Amy, or Donna, she has a career that she is working hard to achieve. She loves a man that loves someone else and what does she do? She does the mature thing and voluntarily removes herself from the situation without drama or anger. She is the only companion who isn’t a victim. She doesn’t lose her memory, she isn’t lost, she isn’t abandoned. She adapts and thrives and moves on. Martha’s competence is summarized in her very first appearance. The Doctor needs her to run the MRI machine and she doesn’t know how. Instead of dithering or flipping out, she finds the damn instruction manual and figures it out all by her damn self.