With great power comes great responsibility?

A commenter makes a good point regarding the actions of the vamp characters in the Twilight series:

So in the end, I was disappointed. I thought [Bella] would go out and help people, do great things, travel the world...but instead, she's all wrapped up into making out with her new husband.

Now granted, the Twilight books are romances, not adventure novels, but SOME interesting female protagonists, granted awesome powers and awareness of the predations of evil beings on humanity, would choose to fight the nasties. It doesn't even have to preclude lots of sex with your similarly superpowered mate.