I'm a pro opera guy but not in business anymore.(I'm not 27 years old and I'm not from China)
My favorite aria as you already guessed is "Nessun Dorma".
I'm pretty open minded person but I prefere when a Jazz singer sings Jazz and Opera one sings Opera.
The hudge irritation for me are interpretations like Areta Franklin's and Pal Potts Versions that so many people enjoy,I'm against democracy in that cause it shows it's ugly side, media manipulation of the masses, and a good one. Pal potts success iritates me not because I'm gelous but because it shows how far away from true art masses are.