I'm not at all thrilled with Scy. Clinton, but the only worse scenario I could see, would be voting GOP.
I like Sen. Warren's push for financial fairness & opportunity, but besides that single dimension (and it's a very good one!), I don't see much else - though I suspect that could change if she were to campaign for office.
But now Sen. Sanders - he is really showing some spunk! And the more I see, the more I like. And, I believe he would likely work on financial reform as well as Sen. Warren. I'm most impressed not just width his breadth, but his depth; he's been at this, seemingly unchanged, since the early '70's. And when he gets into office, he continues to champion his electioneering causes! And executes them well!
He gets my vote hands-down in the primary, and obviously all-the-way if he makes it to the Presidential.
Otherwise, I'll begrudgingly vote for Secy. Clinton based primarily on her dedication to national healthcare. But it will be a vote of GOP opposition, not one of HRC support.