What are your thoughts? Do you think it's always necessary to devise a program like this for each piece?
I usually have a better idea of how a piece should sound musically (e.g. how passages should be phrased, where to slow down, where to accent, what themes to bring out, etc). I think this comes mostly from intuition and experience with a particular composer's works (or the time period of the music) rather than formulating a story to convey through the performance.