I keep flip-flopping. On the pro side, they make a good couple. On the negative side, it came out of nowhere. On the pro side, it shows that two people, both of whom were treated shabbily by the Doctor, are kicking ass in their own right *and he acknowledges that.* On the negative side, Martha seems to have given up her life plans after being coaxed into something else by a man, which makes me o.O more than a little. On the pro side, a happy couple of color. On the seriously negative side, it can also be viewed as two people of color finding each other as a consolation prize after realizing they could never "get" the white people they pined after for a long time, which is O.O NO!.