Perspectives of Creators

I recently discovered a recording of George Gershwin (1898-1937) playing a version for piano of his own composition Rhapsody in Blue, which was originally written in 1924 for piano and orchestra.  What a delight to hear the composer himself render some passages in very different ways than they are usually conducted--showing some humor here, and uptempo transitions there.  Of course it does not make for a definitive rendering of the piece, but it's always good to hear the creator's perspective, be it in music, or literature, or art.