Why is Un Ballo in maschera not as popular as the trio of Verdi masterpieces – Rigoletto, Traviata, Trovatore – that, with a couple of digressions, preceded it in the early 1850s? Its music is scarcely less brilliant than theirs, and if its plot is on a par of absurdity with Trovatore’s, it is at least, on the whole, more fun. One problem might be a certain thinness in the portraiture, as if Verdi was more interested in the incidents than in his characters.

Berlioz called it a "concert opera". His telling of the Faust story is in scenes and highly theatrical, but a bit of a challenge to put on in the theatre, with its marching armies, floating sylphs, dancing will-o’-the-wisps and galloping horses. It seems he expected it to be a kind of giant cantata, and that’s the way the Hallé and Sir Mark Elder perform it.

The flayed corpse of a dead seal hangs red and grotesque at the back of the stage. It’s a placeholder; we know that by the end of Anthropocene – Scottish composer Stuart McRae’s latest collaboration with librettist Louise Welsh – something more familiar, and far more horrifying, will take its place.

Backstories, we're told, are a crucial part of stage visionary Richard Jones's rehearsal process. Janáček, or rather Russian playwright Ostrovsky on whose The Storm the composer based Katya Kabanova, gives several of his hemmed-in characters narratives to suggest what they were and why they are where they are now (not good), stuck in a deadly dull – or just plain deadly – provincial town. It's a tribute to Jones's outwardly spare production that we want to know more.

A sad tale’s best for winter, and Opera North have returned to Janáček’s lyrical taken on a classic Russian drama of domestic abuse, guilt and suicide for this ingredient of their current season. Director Tim Albery and designer Hildegard Bechtler created their production 12 years ago, revisiting their partnership on the same opera for the company eight years before that.

Harpers on the undeniably offensive aspect of Wagner the man might question attending a concert performance of his second Ring opera on World Holocaust Day. Fortunately there's nothing anti-semitic to be found anywhere in Die Walküre.

Prince Yeletsky, one of the shortest roles for a principal baritone in opera but with the loveliest of arias, looms large in Stefan Herheim's concept of The Queen of Spades.

Once upon a time there was the terrible mouth of Richard Jones's Welsh National Opera/Met Hänsel und Gretel, finding an idiosyncratic equivalent to the original Engelbert Humperdinck's dark Wagnerian heart. Then came something very nasty in the witch's deep freeze of the last Royal Opera staging, something of a dog's dinner from Patrice Caurier and Moshe Leiser.

The Royal Northern College of Music’s December opera production was the useful double bill of Suor Angelica and Gianni Schicchi from Puccini’s Trittico.

When the biggest laugh in Bernstein’s Candide goes to a narrator’s mention of how nationalism was sweeping through Europe, you may have a problem. Still, the Bernstein Centenary has been among the best of all possible anniversary celebrations this year and at the LSO Candide - the great man’s bonkers operetta-ish take on Voltaire, a flawed masterpiece with a succession of glorious tunes and snappy lyrics - could have been its apex. At times, it was.