Martha's character was (IMO, anyway) doomed from the start by having her pining over the Doctor like an adolescent. Her whining about the fact he was so hung up on Rose made me want to throttle her. I have no objection whatsoever to romance on Who but IMO it was handled very badly. An equal for the Doctor, I can believe. An adolescent and an adolescent-like person...not so much, and that's what we got.
Granted how they handled/wrote Martha was crap. What I meant, was that Rose should have had a thing for Ten, and Ten shouldn't have noticed, period. Not the, didn't notice because he's pining over a teenager (Which I hated).
In a way, I like season four the best, because there was none of the romantic stuff. I just needed a break from it (though the River stuff in the library two parter was great).