Ironically you have just touched on a major issue why Hillary is the favorite to win: Bill. Kind of surprising I know, but this is a big thing people that want Hillary to win have told me.
An older friend of mine put it well when I was talking to him a few weeks past and asked him his opinion on 2016 elections. To quote him, he said, "I can't wait for the Clintons to get into the White House. When the Clintons were in the White House America acted like America."
It is a rather simple concept to understand. For the commonfolk in America the 1990s were generally good economically and culturally there wasn't so much controversies, at least by comparison to the 21st Century AD so far. Many people whom don't even follow politics think that by picking Hillary we can reclaim some of the relative peace and prosperity of the 1990s. Personally I am a bit skeptical of that given how things are right now, but it is a good example of why Hillary has so much support.