The thing about Martha is that she seems to get it a lot more than Rose ever did - what her role is, what she can and can't be. Possibly because Nine was initially far more bonded to (and dependent on) Rose than Ten is to Martha. So, while I cringe on her behalf every once in a while, she seems to mostly understand how life with the Doctor is going to go, so it's kind of okay. Still ... poor Martha, in a dysfunctional relationship despite herself. Heh.