I like Aida
I am not all that big of a Verdi fan. His Requiem (Von Karajan's recording at the Salzburg Festival) is OK, but I prefer Mozart/Süssmayr's score. Il trovatore has three or four big moments, and - beyond that - I am not all that hyped-up over it. I have the Von Karajan/Callas/La Scala EMI recording, if that matters.
However, I like Aida. My recording of choice, as pictured above, is the Muti recording with Caballé and Domingo. As far as grand opera goes, it doesn't get much grander than this. I am not a big fan of Riccardo Muti, largely because of his "tenure" at La Scala. However, his conducting seems spot on, so to speak.
The plot is OK, I guess. However, one doesn't listen to grand opera because it has glorious plotlines. Montserrat Caballé really does make this recording, though. Her rather expansive voice is a good counterpart for Domingo. They sound both heroic and tragic. I don't have quite as much to say as I would for a Wagner opera for two reasons:
1. Verdi doesn't trade in the metaphysical. He trades in those most "interesting" things: emotion and style.
2. I don't moon over singers. Singers are nice, but the real stars of any production are the orchestration and stage design. I could get into why, but I'll just say that I prefer the work of the composer and designer.