I saw the touring company of Rossini's The Barber of Seville about 25 years ago. It was maybe my 3rd opera (after Gounod's Faust and something or other I can't remember). I thought it was great, and was stunned to hear the Overture, which everyone who ever watched Bugs Bunny would find very familiar, the origin of which I had not known. I have since learned that Rossini recycled some of his own previous work for the Overture.
The leading lady part is The Barber of Seville is Rosina. In the production I saw, she was played/sung by a lovely young Chinese woman. For about 5 minutes it seemed incongruous, but then I didn't think about it until the show was over.