@bobsal u1553115,
They are both motivated first by the attainment of power and position (politics) and secondly by setting policy and achieving outcomes (ideology)
Bill is by far the better politician, but Hillary is far more ideological. (and in their case the ideology is liberal).
Bill's a liberal of course, but much more a centrist than his wife. To some extent dragging the party towards the right was a political calculation, but Bill was well suited for that role. Whether or not it always was there or he developed his way of thinking while governing Arkansas, I can't say. I haven't read enough about his early years.
Ceding the matter of healthcare to Hillary during his first term probably had as much to do with his owing her something for sticking by him despite his philandering, as anything else, but I don't believe there is any indication that he was intent on establishing a single payer system. She was.
It's ironic that Hillary is described as a "hawk." By comparison to other Democrats, she may be "hawkish," but I think that this has been, largely, an attempt to counter the foolish notion that women can't be tough, which was even more prevalent when she first gained a position where anyone might care what she thought. Keep in mind too that she was hardly the lone voice among Democrats who announced support for the Iraq War.
According to Bob Gates, she told Obama that she did it for political reasons.
Hillary really believes it takes a village to raise a child.
Should she run and win the nomination and the White House, I think she will be seen as more of a hawk then Obama, but hardly one beating its wings and flexing its talons. Which party controls congress will determine how liberal her agenda will be. If its controlled by Democrats, we will defiantly see a very liberal Hillary. So I don't think you lefties should give up on her and jump to the Warren bandwagon just yet.