I would wager there are a lot more folks with negative feelings about Alabama than Penn State. If I were guessing, I would throw USC into the mix for most hated as well.
Penn State's life as an independent pre-Big11, and then its failure to dominate the BigInteger has made it difficult to really hate.
Texas, Ohio State, and Notre Dame? Plenty of hate to go around.
Also, this does feel like a right and proper final four. Certainly reflects traditional powers in college football. Particularly for the midwest. :-)