There's no way I would root against Watson! I still get upset thinking about last year! Perry would be a fun choice, too.
The story if Tiger would win would be something, though in a way, I'd like him to have to struggle a little! (My feeling is, that by the time this is all done, he is an even better player than he ever way, which is only a bit scary!)
When you get down to it, almost any of them could be a good story... but Watson would be off the charts!
