I get what you're saying and you're right. The ballades were only an example, do you have any other suggestions or advice because I feel that pieces like Debussy's prelude No. 8 and nocturnes are quite often played. Maybe there is something better in the list I made a while ago of pieces that I want to learn and feel somewhat confident in. I posted it before somewhere but I'll put it in again;
---Baroque---
Bach
Invention No. 13, 14
Sinfonia No. 5
WTC Book I, Prelude & Fugue in C Major, C Minor, C sharp Minor, E flat Minor, …
Italian Concerto
Goldberg Variations – Aria
Scarlatti
Sonata K. 380
---Classical---
Haydn
Sonata Hob: XVI:8, Hob: XVI:G1
Sonata Hob: XVI:24, Hob: XVI:37
Mozart
Fantasia in D Minor
Sonata K. 545, "Sonata Facile"
Beethoven
Bagatelle Op. 119 No. 11
Sonata No. 1, 3, 5, 19, 20, 25
Sonata No. 9, 10, …
---Romantic---
Schubert
Impromptu Op. 90 No. 3
Sonata D. 894, “Fantasie”
Sonata D. 960
Glinka
The Lark (arr. Balakirev)
Schumann
Kinderszenen No. 1, “Von fremden Ländern und Menschen“, No. 7, “Träumerei”
Waldszenen No. 1, “Eintritt“, No. 7, “Vogel als Prophet“
Widmung (arr. Liszt)
Chopin
Prélude No. 2, 6, 7, 9, 14, 15, 17, 20, 21, …
Waltz Op. 64 No. 2, Op. 69 No. 2
Nocturne Op. 9 No. 1, 2, Op. 27 No. 2, Op. 72 No. 1, Op. Posth in C-Sharp Minor
Mazurka Op. 6 No. 1
Étude Op. 10 No. 3, 6, Op. 25 No. 7
Sonata No. 2 - III “Marche Funèbre”
Nocturne Op. 48 No. 1
Mazurka Op. 33 no. 4, Op. 68 No. 2
Étude Op. 10 No. 7, 9, Op. 25 No. 10, Trois Nouvelle Études No. 1
Ballade No. 3
Liszt
Consolation No. 3
Étude S.136 No. 12
Étude d’exécution Transcendante No. 3, “Paysage”
Liebestraum No. 3
Hungarian Rhapsody No. 3
Études d’exécution Transcendante No. 11, “Harmonies du Soir”
Alkan
Prélude Op. 31 No. 8
Brahms
Intermezzo Op. 76 No. 7
Ballade Op. 10 No. 1
Tchaikovsky
The Seasons June, "Barcarolle"
Grieg
Lyric Pieces Op. 54 No. 4, "Notturno"
Piano Sonata Op. 7
Moszkowski
Études de Virtuosité, Op. 72 No. 2
---Post-Romantic---
Rachmaninoff
Prélude Op. 32 No. 10
Étude-tableau Op. 33 No. 8 (G minor), Op. 39 No. 2 (A minor), No. 7 (C minor)
Morceaux de Fantasie Op. 3 No. 2, Prelude
Prélude Op. 32 No. 12
Debussy
Rêverie
Prélude No. 10, "La Cathédrale Engloutie"
Children's Corner No. 4, "The Snow is Dancing"
Suite Bergamasque (- III “Clair de Lune”)
Image No. 1, “Reflets dans l’Eau”
Sibelius
Impromptu Op. 5 No. 1, 2, 4, 6
“The Trees” Op. 75 No. 5, “The Spruce”
13 pieces Op. 76 No. 3, “Carillon”
Impromptu Op. 5, No. 3, 5
Satie
Gnossienne No. 5
Scriabin
Étude Op. 2 No. 1
Étude Op. 8 No. 11
Étude Op. 8 No. 12
Ravel
Pavane pour une Infante Défunte
Gaspard de la nuit - II “Le Gibet”
Jeux d’eau
Shostakovich
Prélude & Fugue op.87 No. 4 in E minor