I'm working on about 12 of the sonatas now and I can't help but think that often he is inspired by Spanish Flamenco because he is so phrygian which I rarely hear in Italian composers.
What I need help with is the trills and arpeggios. I noticed in 1 he included the grace note above the trill - indicating it starts above, like we usually do for Baroque. So this means the one he DIDN'T note that way would be normal/classical trills? Some sound better that way! I play some flamenco guitar and now I want to talk to the guitarists I know too! I don't think flamenco does trills starting above? So "when in Rome.." he would have written the Spanish influenced sonatas in that style of trill? I'm hoping to find a discussion where I can share what I've found and hear others' ideas - but from a playing it point of view.
I love playing them on piano, well EVERYTHING is great on piano, but I'm thinking of using my synthesizers on Harpsichord tone!