Bach, Brahms, Schubert, Sibelius, Mahler, Messiaen
Whether you play seriously, as a hobby, or just use it as decoration, I'd be curious to know which make/model and kind (upright, spinet, digital keyboard, baby grand...concert grand???) that you own. Was it passed down? Did you buy it new or second-hand? As for me (it's really my family's but I'm the only one who plays it), I have a beautiful Kawai upright from sometime in the 21st century, but not sure exactly when (it was bought used). I have played several other uprights, and I have not found another that matches it in touch and tone. It has a "brighter" and more bell-like timbre than many other uprights, but I like that. Kawai doesn't seem to be as popular as Steinway and Yamaha, but this instrument is very high-quality and has never let me down. The only downside is that, instead of a middle (sostenuto) pedal, there is a "practice pedal" that just lowers a felt pad over the hammers to mute them (supposedly, so one can practice without disturbing others).