I'm a Dem, but I've always had a mild dislike for Hillary. I dislike her public persona - there is a shrillness that irritates. And I dislike Bill Clinton, more than Hillary, actually, and hold him against her. But I have no problem voting for her and think she would be a very capable president, as unpleasant as the prospect of having Bill and Hillary on TV every day the next four years is to me. Like most Dems I know, I would vote for Hillary, but would prefer to put Obama in the White House b/c he seems to be a true lib (rather than a moderate), and I would like to give a thoughtful, likable person the bully pulpit.
I don't really give a **** what happened in Bill and Hillary's personal relationship. I don't know what their arrangement is, and frankly, I just don't care, and think it has very little to do with whether or not she would do a good job in office.
(I also bet that like W, Hillary is a lot more charismatic complex in person than she appears to be on the public stage.)