Learned Rachmaninoff's Prelude in C# minor op. 3 no. 2, then didn't play it for a year and a half. Rendition done on a 49 key keyboard, much too small for the original work.
Not really sure if this qualifies as a sketch considering the large time frame.
“Don’t you think it’s good music?”
“It isn’t bad, only I have written much better music, which is not appreciated half so much. All the time, it is that ‘bells of Moscow thing’ they want. I have a
feeling that the public comes to my concerts only to hear me play that one selection – that they sit through the rest of the concert just waiting for it.”