Perhaps if you aim to be a professional concert pianist you need to start thinking about playing the pieces your audience wants to get for their money. But otherwise, really, how can you ask "What piece"? A quick trip to IMSLP+piano produces: "Pages in category ‘For piano’: ... 23,603 total." OK, perhaps 90% of these are not interesting... I couldn't resist looking at the very first, a fantasy on "Ann Boleyn" (Donizetti's opera) by an obscure 19thC French composer, and yeah, it wasn't appealing. But 10% is still 2360. How many composers are named in this thread so far? 10+? What about Scriabin (preludes op11, etude op8-4), Bowen (op128), Granados, Scott Joplin, Lyadov (Op 57), Sibelius, Faure (nocturnes), MacDowell (Woodland sketches), Godowsky (transcription of the Swan from Carnival of the animals; not impossible), Lyapunov, Chasins (Flirtation in a Chinese garden), Dohnanyi (Rhapsody no. 3), Ibert (Histoires), Grieg, Shostakovich (Op. 5), Moszkowski (Etincelles), Prokofiev (Sonata 1), Nazareth (Maly, tango para piano), need I say more. These are all pieces I have played, tried to play, or meant to get round to learning properly, or heard as Horowitz encores or similar. If you just play the same pieces as everyone else, it's going to be hard to find your own individuality, and I think exploring really helps with musical thinking. Specially Scriabin. Try Opp 11-11, 16-1, 37-1, 37-2... Your jumping will improve, at least. HTH