Clair de Lune has pretty much always been a personal favorite of mine. I don't really know how to play piano outside of knowing what note is what on the sheet music and the piano, but it has always been a goal of mine to be able to play Clair de Lune someday on piano even if I can't play it well. It's super calming.

Other than that, Chopin is my favorite piano composer. It's part of why I liked Eternal Sonata so much despite it being only an okay game. I just really like his music.

I've also always quite liked the FF and Kingdom Hearts piano collections music.

These are all things I like to listen to when I'm reading or writing and just want something... quieter I guess than something with more instruments. I'll have to go through this thread when I have more time. I really haven't broadened my experience with piano music much despite really liking the instrument.