Clinton Derangement Syndrome wasn't only spread by the Right. In fact, it was hard to get depressed about that since it's what we all should expect.
No, the really depressing aspect was the way that Left sources propagated it. Media treatment by lefties Obermann, Dowd, Rich, Matthews etc. are an example. The Obama campaign certainly also encouraged it with their "she'll say anything to win" negative campaign from the start.
He would be a great selection, in my opinion. He is progressive, very intelligent, would be qualified to be President if something happened, he is charismatic, has real world experience leading the military, an outsider and would help unify the party.
Too many people - especially the supposed target audience, lower-income voters - associate Edwards with the $400 haircut. Edwards' ability to attract these voters is a myth. He basically spent the 2004 campaign in Appalachia and didn't manage to carry a single state. Not to mention North Carolina.