Verdi's Otello. The first time I listened to this opera, I found it too melodramatic, heavy and artificial, beautiful appearance, but with very little substance; after some years and more musical experience, although I'm still not mad about Otello, now I appreciate it as a very fine and interesting work; the closed forms are less and less recognizable and predictable, because of textures in continuous evolution, more similar to Wagner's musikdramas.