Good to see you back and well done, I enjoyed it very much. It reasserts for me several important aspects of this type of impassioned romantic playing. Firstly, there is the supreme importance of phrasing and rhythm. Of course the "what", the notes you play are important too, but put it this way - it is very easy to play a huge bunch of conveniently appropriate notes brilliantly and say absolutely nothing - thousands of professionals do it all the time. There has to exist, it seems to me, and the same thing goes for playing composed pieces I would say, the feeling that something is going somewhere, a feeling of dynamic surprise and purpose which catches the breath and provokes the question, "what will happen next". And then when something does happen, the really finest improvisation seems to say, "Ah, that wasn't what you expected was it ? But now you've heard it, it's the only thing you can imagine happening, isn't it ! Got you there !"
I received this sensation once or twice in your piece, as I did in John Wilson's composition. It cannot be manufactured from a recipe, and as I get older, most music fails to produce it altogether. But it can be given the right soil, in the form of constantly cultivating eclectic rhythmic and textural variety in one's figurations - another reason why I regard grinding away at regular monotonous forms every day - scales and so on - as wholly destructive of improvisational impulse.
Then once this extremely rich and varied soil is established in the mind, admittedly over many years, the greater the likelihood that critical mass will be reached during any given attempt at improvising.
I noticed a good many new grips and figurations in this piece I had not heard from you before. Whatever you have been doing during your absence, I say carry on doing it !