Heh, I find much music exciting - so much that it would be hard for me to single out individual works... but I can at least start:
Bach - Piano Toccata C minor
Bach - Kyrie from Mass in B minor, St. John's Passion, numerous church cantatas
Mozart - String Quintets in C major and G minor, K515, 516
Mozart - Piano Concertos C major K503, D minor K466
Mozart - Don Giovanni, 2. act
Beethoven - almost all of his late works for piano and for string quartet + a lot of other stuff
Schubert - Piano sonatas D major D850, C minor, D958 - A large amount of lieder
Schumann - Kreisleriana, Carnaval, Faschingsschwank aus Wien, Piano Concerto
Liszt - Faust Symphony, Piano Concerto in E flat, most of Annés de Pèlerinage, all three vols.
Dvorak - Symphony #9, Cello Concerto, Sonatina for Violin & Piano
Brahms - Handel Variations
Brahms - Piano Concerto #1, d minor
Brahms - Symphonies #3 & #4
Brahms - Cello sonata in F-major, Violin sonata in d minor, Piano Quintet
Mahler - Symphonies 1, 5, 6, 7, 9, 10
R. Strauss - Elektra, Salome, Frau Ohne Schatten, Rosenkavalier, Arabella
R. Strauss - 4 Letzte Lieder, Metamorphosen for strings
Debussy - Images I-II, Preludes I-II, L'Isle Joyeuse
Ravel - Piano Concerto G major, Gaspard de la Nuit, Miroirs
Bartók - Viola Concerto, Piano Concertos 2+3, Concerto for Orchestra, a large amount of his piano music, Violin Sonata #2, String Quartet #5
Janacek - Makropoulos Case, Jenufa, Katya Kabanova,
Janacek - Sinfonietta, Violin Sonata, Galgolitic Mass
Shostakovich - Symphonies 1, 4, 5, 10, 13, 14, 15, Concerto for piano with trumpet
Stravinsky - Petrushka, Sacre du Printems, Les Noces, Symphony of Psalms
Nielsen - Symphony #5
Geez - I have to stop now though there is much much more...