opera: [countable] a company that performs opera; a building in which operas are performed
We only use the with general plural nouns when we are referring to a specific set within a general class of people or things.
Books are so important in my life. (I mean all books in general.)
The books were all over the floor. (I mean specific books that you and I know).
By applying this rule, we got
"I love to go to operas" (I mean all operas in general.)
But we've also got this rule
When we talk in general about inventions, musical instruments or cultural institutions (such as the cinema, the theatre, the circus, the opera, the ballet), we often use the:
The computer must be the greatest invention ever. (The computer as an invention in general, not a specific computer)
The violin sounds different to the viola.
I love a night at the opera.
So, "I love to go to the opera" (the opera as a cultural institution in general, not a specific cultural institution.)
So, What are the differences between "I love to go to the opera" or "I love to go to operas"?