Posted inBlue, Angel La Traviata (Opera) Mayer, Michael Metropolitan Opera Norma (Opera) Opera ‘Norma’ and ‘La Traviata’ Return to the Met Opera Sonya Yoncheva doesn’t fill out the long lines of “Norma” at the Met, while Angel Blue is a warm, sincere Violetta in “La Traviata.” Posted by By Zachary Woolfe