Tough to come up with a ranking because people's tastes are different.
To begin with start with Mozart's Don Giovanni, Magic Flute, and La Nozze di Figaro....
Eventually you should tackle Wagner's Ring and Tristan und Isolde, those are the top 5 for me, although tastes vary and you shouldn't quite start opera listening from Tristan, because most likely you won't enjoy it.
To begin with start with Mozart's Don Giovanni, Magic Flute, and La Nozze di Figaro....
Eventually you should tackle Wagner's Ring and Tristan und Isolde, those are the top 5 for me, although tastes vary and you shouldn't quite start opera listening from Tristan, because most likely you won't enjoy it.