As Kathy Halbreich prepares to depart Minneapolis’s Walker Art Center after a 16-year tenure as director, she warns that despite its recent run of success, the Walker cannot afford to ever rest on its laurels. “Walker can never be a vanilla organization because other people know how to make vanilla better than we do. That goes for our city, too. Vanilla isn’t good enough. We need to make sure there is spice and adventure in all of our civic institutions.”