The NCAA Tournament has returned, and with it your chance to gloat all over your friends, family, and co-workers with your flawless NCAA bracket. But which way to turn? Villanova? Duke? Middle Tennessee State? With the help of Yahoo Sports' bracket expert Jeff Eisenberg, we've got your guide right here. We walk through all four regions, pick our wins and best chances for upsets, and show you the way to Bracket Nirvana. Join us!