Top favourite Russian Romantic (or with roots in a Romantic tradition) symphonies (out of ~90 heard), with a selected highlight from Youtube.

1. Nr. 3 "Ilya Muromets" B minor, Reinhold M. Glière (1911).
2. Nr. 2 "Antar" B minor, Nikolay A. Rimsky-Korsakov (1869).
3. Nr. 2 "Bogatyrskaya" B minor, Alexander P. Borodin (1876).
4. Nr. 1 G minor, Vasily S. Kalinnikov (1895).
5. Nr. 2 E minor, Sergey V. Rachmaninoff (1907).
6. Nr. 1 "Classical" D Major, Sergey S. Prokofiev (1917).
7. Nr. 5 E minor, Pyotr I. Tchaikovsky (1888).
8. Nr. 1 "Slavyanskaya" E Major, Alexander K. Glazunov (1881).
9. Nr. 2 D minor, Mily A. Balakirev (1900).
10. Nr. 2 A Major, Vasily S. Kalinnikov (1897).
11. Nr. 1 E minor, Nikolay A. Rimsky-Korsakov (1865).
12. Nr. 13 "Babi Yar" B-flat Minor, Dmitry Shostakovich (1963).
13. Nr. 3 "The Divine Poem" C Minor, Alexander N. Scriabin (1904).

Top favourite Russian operas (out of ~100 heard), with a selected highlight from Youtube.

1. "The Legend of the Invisible City of Kitezh and the Maiden Fevroniya", Nikolay A. Rimsky-Korsakov.
2. "Boris Godunov", Modest P. Mussorgsky (1869 and 1872 versions, as well as that of Rimsky-Korsakov - all are amazing! 9 different recordings in personal CD collection).
3. "Khovanshchina", Modest P. Mussorgsky (Shostakovich version, as in Staatsoper Wien, extended Shostakovich version, as in Mariinsky St. Petersburg, and Rimsky-Korsakov version - all are amazing! 7 different recordings in personal CD collection).
4. "Ruslan and Lyudmila", Mikhail I. Glinka.
5. "Tale of tsar Saltan", Nikolay A. Rimsky-Korsakov.
6. "Sadko", Nikolay A. Rimsky-Korsakov.
7. "Mlada", Nikolay A. Rimsky-Korsakov.
8. "Snow maiden", Nikolay A. Rimsky-Korsakov.
9. "Prince Igor", Alexender P. Borodin.
10. "Salammbô", Modest P. Mussorgsky (orchestration of 6 scenes by Zoltán Peskó).
11. "The Fair at Sorochyntsi", Modest P. Mussorgsky (both introductions - by Lyadov and Shebalin).
12. "Life for the Tsar", Mikhail I. Glinka.
13. "Cherevichki", Pyotr I. Tchaikovsky.
14. "Christmas eve", Nikolay A. Rimsky-Korsakov.
15. "Judith", Alexander N. Serov.
16. "Betrothal in the monastery", Sergey S. Prokofiev.
17. "Oprichnik", Pyotr I. Tchaikovsky.
18. "Maid of Pskov", Nikolay A. Rimsky-Korsakov.
19. "Tsar's Bride", Nikolay A. Rimsky-Korsakov.
20. "Aleko", Sergey V. Rachmaninoff.
21. "May night", Nikolay A. Rimsky-Korsakov.
22. "Kashchey the Immortal", Nikolay A. Rimsky-Korsakov.
23. "Love for the three oranges", Sergey S. Prokofiev.
24. "Golden Cockerel", Nikolay A. Rimsky-Korsakov.
25. "The gamblers", Dimitry D. Shostakovich.

I am still looking for full recordings of some very intriguing operas, for example: "Dobrynya Nikitich" by Alexander T. Grechaninov; "Rogneda" by Alexander N. Serov; "Dream on Volga" by Anton S. Arensky. Also, some operas by Vladimir I. Rebikov, "Oresteia" by Sergey I. Taneyev, "Askold's Grave" by Alexey N. Verstovsky.

Top favourite Russian Romantic symphonic pieces (out of many many heard), with a selected highlight from Youtube.

1. "Sheherazade", Nikolay A. Rimsky-Korsakov (1888).
2. "Russia - 1000 years", Mily A. Balakirev (1864).
3. "Easter overture", Nikolay A. Rimsky-Korsakov (1888).
4. "Ballade - about ancient times", Anatoly K. Lyadov (1889).
5. "Night on the bald mountain", Modest P. Mussorgsky (the original version, as well as the other two - arranged by N. A. Rimsky-Korsakov, and from the opera "The Fair at Sorochyntsi") (1867).
6. "Concert fantasia on Russian Themes", Nikolay A. Rimsky-Korsakov (1887).
7. "8 Russian folk songs for orchestra", Anatoly K. Lyadov (1905).
8. "Prince Khomsky", Mikhail I. Glinka (1840).
9. "Rhapsody on Ukrainian themes", Sergey M. Lyapunov (1907).
10. "Fairy tale (Skazka)", Nikolay A. Rimsky-Korsakov (1880).
11. "Caucasian sketches", Mikhail M. Ippolitov-Ivanov (1896).
12. "Gyul'sara Overture", Reinhold M. Glière (1949).
13. "A Fragment from Apocalypse", Anatoly K. Lyadov (1912).
14. "In the steppes of the central Asia", Alexander P. Borodin (1880).
15. "Overture On Three Russian Themes", Nikolay A. Rimsky-Korsakov (1866).
16. "Kikimora", Anatoly K. Lyadov (1909).
17. "Summer night in Madrid", Mikhail I. Glinka (1851).
18. "Snow storm", Georgy V. Sviridov (1975).
19. "Islamey", Mily A. Balakirev (1869).
20. "Heroic march for the Buryat-Mongol Republic", Reinhold M. Glière (1936).
21. "Bylina", Vasili S. Kalinnikov (1892).
22. "Fantasia on Russian Themes (after Ivan Ryabinin)", Anton S. Arensky (1892).
23. "Enchanted Lake", Anatoly K. Lyadov (1909).
24. "Capriccio Espagnol", Nikolay A. Rimsky-Korsakov (1887).
25. "Hashish, an Oriental Symphonic Poem", Sergey M. Lyapunov (1914).

Top favourite Russian ballets, with a selected highlight from Youtube.

1. "Petrushka", Igor F. Stravinsky (1911).
2. "Chout" ("Fairy tale about the joker who outwitted seven other jokers"), Sergey S. Prokofiev (1921).
3. "Pulcinella", Igor F. Stravinsky (1920).
4. "The Leap of Steel" ("Le pas d'acier"), Sergey S. Prokofiev (1926).
5. "The Rite of Spring" ("Le Sacre du printemps"), Igor F. Stravinsky (1913).
6. "Prodigal Son" ("L'Enfant prodigue"), Sergey S. Prokofiev (1929).
7. "Nutcracker", Pyotr I. Tchaikovsky (1892).
8. "The Bolt", Dimitry D. Shostakovich (1931).
9. "Raymonda", Alexander K. Glazunov (1898).
10. "Romeo and Juliet", Sergey S. Prokofiev (1935).

Top favourite Danish Romantic symphonies (out of ~50 heard), with a selected highlight from Youtube.

1. Nr. 5 C-major, Louis Glass (1920).
2. Nr. 3 "Forest symphony" D-Major, Louis Glass (1901).
3. Nr. 6 "Birth of Scyldings", Louis Glass (1926).
4. Nr. 2 E-Major, Ludolf Nielsen (1909).
5. Nr. 1 "Autumn" D-minor, Peter Langer-Müller (1879).
6. Nr. 1 C-minor, Hakon Børresen (1900).
7. Nr. 4 E-minor, Louis Glass (1911).
8. Nr. 2 C-minor, Louis Glass (1899).
9. Nr. 5 "Nature of the Steppe", Rued Langgaard (1918).
10. Nr. 2 "Sea symphony" A-minor, Hakon Børresen (1900).
11. Nr. 1 B-minor, Ludolf Nielsen (1903).
12. Nr. 4 D-minor, Victor Bendix (1906).
13. Nr. 4 "The Inextinguishable", Carl Nielsen (1916).
14. Nr. 1 E-Major, Louis Glass (1894).
15. Nr. 5 "Symphonie sérieuse" G-Minor, Asger Hamerik (1891).

Top favourite British Romantic symphonies, with a selected highlight from Youtube.

1. "Hebridean symphony", Granville R. Bantock (1925).
2. Nr. 5 D-Major, Ralph Vaughan Williams (1943).
3. Nr. 3 "Pastoral symphony", Ralph Vaughan Williams (1922).
4. Nr. 5, Arnold Bax (1932).
5. "Celtic symphony", Granville R. Bantock (1940).
6. Nr. 1 B-flat minor, William Walton (1934).
7. Nr. 1 "Sea symphony", Ralph Vaughan Williams (1909).
8. Nr. 2 "London symphony", Ralph Vaughan Williams (1914).
9. "Pagan symphony", Granville R. Bantock (1927).
10. Nr. 4, Edmund Rubbra (1942).

Top favourite European (non-Russian, non-Lithuanian) operas, with a selected highlight from Youtube.

1. "Bluebeard's Castle", Béla Bartók (1911).
2. "Rusalka", Antonín Dvořák (1900).
3. "Parsifal", Richard Wagner (1882).
4. "Hugh the Drover", Ralph Vaughan Williams (1924).
5. "La Fanciulla del West", Giacomo Puccini (1910).
6. "Das Rheingold", Richard Wagner (1869).
7. "Semiramide", Gioachino Rossini (1823).
8. "The Devil and Kate", Antonín Dvořák (1899). Listen only to the sound - picture is out of sync.
9. "Elektra", Richard Strauss (1909).
10. "Pelléas et Mélisande", Claude Debussy (1898).
11. "Der Freischütz", Carl Maria von Weber (1821).
12. "Julius Caesar in Egypt", George Frideric Handel (1724).
13. "Sir John in Love", Ralph Vaughan Williams (1929).
14. "Les Troyens", Hector Berlioz (1863).
15. "Bartered Bride", Bedřich Smetana (1866).

Top favourite European (non-Russian, Danish, British) Romantic (or sprung from Romantic tradition) symphonies, with a selected highlight from Youtube.

1. Nr. 9 E-minor "From the New World", Antonín Dvořák (1893).
2. "Concerto for Orchestra", Béla Bartók (1943).
3. Nr. 9 "The Great" C-Major, Franz Schubert (1825).
4. Nr. 8 C-Minor, Anton Bruckner (1890).
5. "Alpine Symphony", Richard Strauss (1915).
6. Nr. 8 G-Minor, Antonín Dvořák (1889). In fact, all his symphonies
7. Nr. 5 C-Minor, A. Bruckner (1876). In fact all his symphonies, including Die Nullte and Study Symphony.
8. Nr. 1 D-Major, Gustav Mahler (1888).
9. Nr. 3 B-Minor, Ernst Rudorff (1911). Unfortunetelly, not yet on Youtube. Here is Symphony Nr. 2.
10. Nr. 2 D-Major, Jan Sibelius (1902).