Elizabeth Warren is very solid on paper because she would bring in the young constituency that was heads-over-heels for Sanders, but I am still hesitant to think Hillary will pick her. She has a little too much star power, and would likely overshadow Hillary on the stump.
Out of these choices, I'd say Kaine, but I don't really feel it'll be him either.
You know, I have been wondering, is that necessarily a bad thing? As long as the people vote for their ticket, it accomplishes what Hillary wants.
Clinton has too much baggage, so why not hide it behind generous proportions of Warren wrapping paper?