La Traviata owes its enduring popularity to a superb story of young love and fatal sacrifice, set to music by Italy’s master melodist at the peak of his powers. Interest and poignancy are added by the fact that this is a true story - the baritone ‘heavy’ is Alexander Dumas who wrote The Count of Monte Cristo. But it is the central figure, the heroine Violetta, the archetypal ‘whore with the heart of gold’ who dominates the piece. It is her opera and we love her for it.

Carmen is among the most popular operas for all the obvious reasons: great characters, a gripping story, and fabulous music. But what sets it on a pinnacle is an amazing combination of three factors: a sizzling Gipsy heroine (one of the most psychologically complex and compelling characters in all theatre), great atmosphere (Spain, hot sun, the bull-ring), and the prodigality of melodic invention - one great tune after another, at least a dozen of which are the staples of Madison Avenue and the animated cartoon.

Fidelio is a work like no other. Beethoven’s only opera is about the joy of married love - by a man who never knew that pleasure. It is about heroism by a man who was often mean and petty in his human relations; it is about freedom by a man who was a prisoner of his own deafness; and ultimately it is about joy by a man who experienced precious little of it.

Rigoletto is simply wonderful entertainment with superb music. It is also much more - a daring (for its time) attack on aristocratic privilege, a tender love story, and an impassioned appeal on behalf of the disadvantaged, all set to music of such wealth and beauty that, with its sister operas La traviata and Il trovatore, it has defined Italian opera for 150 years. Overcoming initial trouble with the censors, Verdi's Rigoletto was a smash hit at its premiere and has not been out of the repertoire since. It’s not hard to see why.

Verdi’s Falstaff repays careful study with real pleasure. It is opera’s happiest irony that the great Italian master should cap a career - distinguished for its blood-and-thunder tragic masterpieces - with the greatest comic opera in the Italian repertory. The genius of Shakespeare is harnessed (in a miracle of compression) by master-librettist Boito to give the 80-year-old Verdi a superb libretto, on which he lavished more wonderful tunes than most composers manage in a lifetime.

Madama Butterfly runs the gamut of operatic emotions. The title heroine has a fragility wonderfully expressed in her entry music, deep sexual instincts as shown in the love duet, and immense tragic stature in her last hours. The fate of Madama Butterfly - married to an American sailor and then abandoned - engages our emotions to a degree equaled by few other opera heroines. The oriental setting and the exquisite orchestral and choral writings are treasured bonuses.

L’elisir d’amore, or The Elixir of Love, has remained popular for almost two centuries because of a touching tale and a galaxy of comic characters adapted from the traditional commedia dell’ arte. Above all Donizetti poured into the score all the warmth and tenderness of the Italian temperament.

Pagliacci may be the most completely compelling short opera in the repertory and owes much of its impact to a brilliant story based, it is said, on true life and told through the device of a play-within-a-play. The action is set in Calabria in the deep south of Italy where the jealousies and illicit passions of a troupe of strolling actors precisely intersect with the play they are performing - to both touching and tragic effect.

Cavalleria rusticana is the short opera that has all the elements of a grand opera compressed into a single highly dramatic time span. The story of love, lust, blood-feud, and betrayal played out against the pageantry of the Easter celebrations in a Sicilian village delivers an emotional wallop because of the youthful vigor and musical wealth of its great score which includes the glorious "Easter Hymn" and the deeply moving "Intermezzo". Mascagni was never to repeat his youthful success but this brief work is enough to ensure his immortality.

The Flying Dutchman is the perfect opera with which to approach the operatic mountain that is Richard Wagner. It is short, has a great story (the legend of the Dutch captain doomed to sail forever unless redeemed through love), and the striking score has many pre-echoes of Wagner's later great music dramas. It contains wonderful tunes in its arias, ensembles, and big choruses, and the orchestral writing - from the gale that blows out of the Overture to the final theme of "Redemption through Love" - will "blow you away".

Many opera-lovers would name The Marriage of Figaro as their favorite opera. It appeals to the most intellectual listener, but also to music-lovers seeking great melodies and ensembles (while it remains accessible through its fascinating plot and memorable characters) and to those seeking only entertainment. One of three operas by Mozart to libretti by Lorenzo da Ponte, it represents one of the pinnacles not just of operatic but of human achievement.

Così Fan Tutte contains some of Mozart’s most sublime music. On one level, the opera is purely a social anecdote about young people falling in and out of love; but Mozart was a supreme sensualist and a great humanist, and invested the tale with all his understanding of humanity and young love. In this title, David Timson refutes the charge that Mozart squandered his genius on a work full of trivial nonsense and proves this "miraculous yet problematic" opera to be a great work of theatre. To listen to this thought-provoking examination of the characters and the music is both thoroughly enriching and great fun.

Don Giovanni has long been regarded as Mozart’s supreme theatrical achievement. The subject seems unpromising - the last day in the life of the notorious womanizer Don Juan - but the skill of the librettist allied to the genius of Mozart at the very peak of his powers has created a work which is not only highly entertaining but reflects an incredible understanding of the human condition.

La Bohème is one of the three operas - the others are Carmen and Aida - believed to be the most popular ever written. In the case of La Bohème the reason is that it virtually defines the term "romantic". The poignant story of Mimì and Rodolfo is told in music of such tender beauty, allied, as always, to Puccini’s intuition of what works in the theatre. The result is an opera that readily appeals to our emotions and senses.

Wagner’s Ring cycle is the most ambitious work in the history of music: four operas that combine to tell a single epic story. Based in legend, it has become a legend in its own right: a supreme challenge for conductors, singers, opera producers, and indeed for audiences. But for all its grandeur and complexity, The Ring is far more accessible than many music lovers think.