I play (let's better say practice) 5 Scarlatti sonatas, K1 as the hardest among them, whereas K32 seems to be the easiest. Scarlatti is great fun to play and btw a brilliant source for learning ornamentation patterns, but never really easy. Some look easy like K11, the "Segovia Sonata" in e minor, but it isn't. The most beautiful one to my opinion is one without any ornamentation at all: K 87 in b minor. Fantastic piece, so sublime and severe.
The secret of getting ahead is getting started (Mark Twain)
Andrea Tacchi, Enrique Garcia model, Spruce/BRAZ, 2016
Giovanni Tacchi, Daniel Friederich copy, cedar/EIR, 2017