Cyrano de Bergerac with Plácido Domingo singing the title role at the Royal Opera was an interesting experience. It took me most of the first act to realise it is a fairly modern opera (early 20th century): Franco Alfano was influenced by many of his contemporaries. Also, I had to sever, in my head, any links between Alfano and Puccini so that I stopped anticipating those big sentimental moments.
What was enjoyable? Domingo's still ringing voice. Visually it's beautiful - pretty to look at.
What was not enjoyable? The fact that I probably won't remember any of this.