I find this article very interesting. The teams in the red are the ones that I have been back and forth on picking in first round upsets: West Virginia, Duke, Arizona, Notre Dame, Baylor. Just a last minute link if you're not done filling out your bracket!
http://www.wired.com/2016/03/how-to-win-your-office-pool/?mbid=social_twitter
http://www.wired.com/2016/03/how-to-win-your-office-pool/?mbid=social_twitter