No one of any quality would be happy with Bob Barr over Ron Paul on a Barr/Paul ticket.
Barr can't hold a candle to Ron Paul, Barr has accomplished NOTHING, and has never voted ON PRINCIPLE. Ron Paul is Zeus and Barr is a slug. The only way Barr got the Libertarian nomination, was by striking a deal with Wayne Allyn Root.
Walter Block says it best. Barr/Root are marginally more libertarian than Palin. That's not saying a lot.