I'd like to see Hung win. He has the best skills, but holding back (his downfall?). Also, contrary to the popular view, I believe he is very passionate about his food.
Casey to me has been stoic. However, her dishes have been a hit so I wouldn't be surpised if she actually wins.
Dale - He's amusing to watch in a train wreck/drama queen/slapstick sort of way - full of energy, foul language and mishaps.