OK someone explain the "Planet Zovirax" bit. It went over the american's head
OK two callbacks from Series 1 and 2. One, the Doctor grabbing Martha's hand and running down the corridor echoing Rose and CE first ep. Two, the Doctor being so delighting at the "little shop" in the hospital, and of course, the setting being a hospital at all.

ALSO

when the Doctor is squating beside the Slab {or whatever the name was} the fully leather thing and he says " someone has a hell of a fettish" all I could think abotu were Ten's bare feet

Did the Doctor say he HAD a brother?

The Sonic Screwdriver burning out nearly broke my heart. My kid, who has only watched a few eps, could not understand why I {and the Doctor} were so crushed

and OMG! Ten hair

I really love the new Companion is so very different from Rose. Rose was young, uneducated, but all spunk and emotional logic. She had no real pull to earth except he Mum. I think that's why The Doctor was so taken with her. Rose was someone who, given the choice, really could have stayed with him her whole life. I think it's very telling Jackie told her at the end she was becoming "less human" hanging with the Doctor.
Martha is clearly from a wealthier family {altho very irritating} it looks like she's been able to achieve whatever she's ever wanted in life. Now suddenly she meets the Doctor and her world explodes. I think no matter what efforts she puts forth, she might not always get what she wants. Namely, the Doctor.