I just LOVE this - Chopin is #1 in my book!"Before Liszt, it was considered almost in bad taste to play from memory," Hough explains. "Chopin once chided a student: It looked almost arrogant, as if you were pretending that the piece you were playing was by you. Liszt saw that playing the piano, especially for a whole evening in front of an audience, it was a theatrical event that needed not just musical things happening but physical things on the stage." (from https://www.npr.org/2011/10/22/141617637/how-franz-liszt-became-the-worlds-first-rock-starI have great respect for this because it is very true. We that play classical are not creating music - we are reciting it - like a stage actor. And now with Chopin's notion in my mind, I would vote for ALWAYS playing with sheet music, however it is not practical. I need to be able to play a piano I encounter so it HAS to be memorized. But for recital, even if memorized, I think the sheet music should be on the piano, just to make Chopin's point. (And for difficult works, I think you do a much better job if memorized, however memory is another link in the chain that can be a weak link.)I just love how the disheveled Helfgott walks into the pub and puts his frayed worn-out sheet music on the piano and impresses! Frankly, I would love to have a stage presence like a Professor Irwin Corey with moths coming out of my torn, stained, and crumpled sheet music - this business is too snobby. Pires hated the formal performance convention - thought they should be laid back "picnics" if you will. I love Pires.
It's worth bearing in mind Beethoven got furious with those who played his music from memory but only because they left out his meticulous markings (and they still do today).