I tend to root against any players who adopt a "the world is out to get me" attitude or who act like they world owes them for all their supposed adversity. Sergio is sort of a poster child for the former and Woody Austin seems to fit as well, while players like Pat Perez and Sabbatini fit the latter.
I don't like any player who feels that their golf life is hard and difficult and that we the poor public just don't understand. Sheesh, you play golf for a living, the only text book you've ever had to read is the Rules book (and amazing how many can't seem to handle that), you get perks handed to you constantly, and get paid a lot of money even if you're well down the money list. Yes, the travel life probably isn't for all of us, but that's the profession you chose - don't try and act like it's a hardship. You want hardship, look to someone like Ken Green trying to regain his status - that's hardship.
Every new Tour rookie should be forced to take "Arnold Palmer Lessons" on what it is to be a gracious professional, and if they can't pass the test then they shouldn't earn their card.