Personally, I really don't like Hillary as a person. However, she, as the apparent heir to the throne of capitalism represents my economic interests better than anything the Repubs have come up with. So until the Repubs really start caring about the interests of the middle class and the poor as much (or as little) as the Dems do, I'll have to give her the nod in the voting booth.
That being said, the Clinton Clan have a lot of formidable political savvy and well-to-do well placed connections built up over their decades of public service. Tough nut to crack in my opinion.
Along with that, I think there's this overwhelming intangible sense of justice denied and owed to Hillary from her staunch suporters after being, from their view, "snaked" out of the presidency by Obama. I'd even chance to say that many Obama supporters share in that sentiment, in the sense that Hillary deserves a second chance after being picked up and unceremoniously dumped on a lonely stretch of beach by the Obama tsunami that literally came out of nowhere. I think this feeling that she is owed is going to play a big part in her effort to have the first "first man" in the White House.
It's going to be a whole hell of a lot of fun watching the Repubs try to pick apart the Clinton campaign enigma, especially with Bill being so adept at firing back with accurate and overwhelming firepower.