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.

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.

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.

Tristan und Isolde centres around two lovers who dream of romantic love and yearn for oblivion. No composer had written such a work before. Turning his back on traditional tonality, Wagner changed the course of Western music with Tristan und Isolde. But there’s also fact behind the fiction: while he wrote his opera Wagner was in love with another’s man’s wife, Mathilde Wesendonk. So Tristan and Isolde are also Richard and Mathilde.

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.

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.

Monteverdi’s Orfeo, first performed in 1607, generates a special excitement because it is the first unquestioned masterpiece of opera. Notable for its precise orchestration and powerful drama it was a groundbreaking work. It concerns the legend of Orpheus, the demigod whose music had the power to conquer the forces of Hell and to bring his wife back, briefly, to life. The extracts used in this introduction are from Naxos’ full recording; it uses authentic period instruments, which serve to evoke the early Baroque period of the opera’s composition.

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.

Ancient Egypt and the war with Ethiopia is the setting for Verdi’s grandest opera. It is the story of the love between Rhadames, the Egyptian general, and Aida, an Ethiopian slave, and the jealousy of Amneris, daughter of the King of Egypt. It was written in 1871 to a commission from the Khedive of Egypt to inaugurate the new opera house in Cairo. Aida generally is considered one of the most spectacular of Verdi’s operas.

Puccini’s swansong has a claim to being the last great popular opera. Its melodies have enchanted audiences since its posthumous premiere in 1926, two years after Puccini’s death. It involves a chilling story of love and cruelty, an intriguing cast of characters against the exotic backdrop of Imperial China, magnificent choruses and ensembles, and dazzling orchestration in an exotic score that comprises a string of remarkable arias - among which the great tenor aria "Nessun dorma" is the jewel. It is more than Puccini’s last opera: It is the last word, in every sense, on Italian opera.

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.

Tosca is Puccini at the peak of his theatrical power. The story of the jealous, impassioned opera singer Floria Tosca and her doomed love for the painter Mario Cavaradossi is played out against backgrounds both historically and geographically overwhelming. It is set in three great and historical locations of Rome during the Napoleonic era. Spectacle, sensuality, and cruelty battle for our attention in one of the most truly "action-packed" works of theatre. Enticing us with just a couple of the "great tunes" from this deeply affecting opera, David Timson then begins setting the biographical and operatic scene.

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.

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".

The Barber of Seville is Rossini’s most popular opera. Its effervescent overture (written originally for another work!) presents a perfect platform for the amusing plot in which the barber, Figaro, stage-manages a romance between Count Almaviva and Rosina, and puts to flight the old suitor, Dr Bartolo. "Largo al Factotum" is one of the most popular arias in opera - nearly 200 years after its first performance it is still one of the great show-stoppers.