We’ve been spoilt over the past few summers in Leeds; Opera North’s semi-staged Ring has been a triumph, and the whole cycle will be performed complete in June 2016. To fill the Town Hall in 2015 we’ve got concert performances of Wagner’s The Flying Dutchman. You have to commend the decision taken to play the work straight through without any intermissions, though it’s a bit of a slog in places; much of Act 2 feels dramatically inert. By contrast, Götterdämmerung’s five hours pass in the blink of an eye.

It’s well-known that Wagner shelved The Ring two thirds of the way through in favour of Tristan with the aim of producing something that could be put on quickly in a conventional theatre. Of course, it didn’t quite work out that way. Yet Tristan, for all its technical difficulties, does lend itself to a relatively small stage. Its ensemble scenes are few and manageable, and for the rest it’s basically a conversation piece.

Dresden is slowly opening up to the world. All but destroyed by British bombing in the Second World War, locked away inside Communist East Germany for 40 years, it is now becoming a tourist honeypot. On a warm day in May, you can see the snap-happy groups of Japanese and Germans trailing behind their guides, marvelling at the imposing Baroque buildings in the Old Town. You see them queuing patiently for the extraordinary museums and poring over the the restaurant menus in the city’s huge squares. One of the local specialities is potato soup, but then nothing’s perfect.

This was a very "concert" performance indeed. Across the stage music stands stood like sentinels lest any rash singer attempted to stand out and – surely not – act. Such fears were misplaced (or the stands did their job) in the end, as the music was what mattered and everyone stood and sang, with one outstanding exception, the Kundry of Mihoko Fujimura.

There’s a lot to be said for concert performances of Wagner. Not only are you spared the post-prandial lucubrations of aspirant directors – the moonmen and the fighter pilots, the jackboots and the biogas installations. But it’s possible to concentrate on Wagner’s greatest theatrical gift: not his stagecraft or stage imagery, but his management of time and psychological growth through purely musical means.

Having been bowled over by the total work of art English National Opera made of Wagner’s The Mastersingers of Nuremberg on its first night, I bought tickets immediately afterwards for the final performance. So I’m off tonight to catch the farewell of what has been an unqualified triumph for the company. Yet only last Thursday an unsolicited email arrived from Amazon Local – there’s no stopping them, it seems – offering tickets for this very show at 40 per cent discount.

After seven glorious Welsh National Opera performances in the summer of 2010, it looked like curtains for Richard Jones’s Mastersingers (or Meistersinger, as it then was, sung in German): no DVD, no co-productions. The director seemed happy with that, as philosophical as Wagner's operatic characterisation of 16th-century cobbler-mastersinger Hans Sachs. Such, he implied, was the ephemeral nature of the true theatrical experience, rare at a time when nearly everything gets documented.

Like the Dutchman himself, Tim Albery’s Der fliegende Holländer makes its inevitable return to the Royal Opera House. Unlike the Dutchman, however, this production has broken free of its cycle of repetition. Perhaps expectations have changed, perhaps after two outings I’ve just surrendered to Tim Albery’s severe and sober staging, but for the first time since its 2009 debut this ghostly ship finally comes in to emotional harbour.

Youth may have vanished from the title, and its first flush is gone from the cheeks of most of the young persons. Now they’re in their prime, a magnificent sight – and the sound, too, is that of a world-class orchestra with a voice. Which we heard at its most distinctive, deep and muscular, from the strings in the opening signals of Beethoven’s Fifth Symphony. So what went wrong with the music from Wagner’s Ring in their first 2015 Southbank concert’s second half?

When everything works – conducting, singing, production, costumes, sets, lighting, choreography where relevant – then there’s nothing like the art of opera. But how often does that happen? In my experience, very seldom, but not this year. It's been of such a vintage that I couldn’t possibly choose the best out of six fully-staged productions – three of them from our only native director of genius, Richard Jones, who as one of his favourite singers, Susan Bullock, put it to me, deserves every gong going – and one concert performance.