Sorabji's transcription of Bach's Chromatic Fantasia has always been a favourite of mine.
I cannot recall any other piece that has moved me personally, but that could be due to a shortage of intelligence and beard length on my part.
Thal
If you've shaved off you beard as you recently stated you had done and if you did so of your own volition rather than under external duress, you would have only yourself to blame for lack of beard length but, as has been stated many times before, beard length or existence and the music of Sorabji have no conceivable connection, as exemplified by the fact that the composer himself never had a beard, Fredrik Ullén, Jonathan Powell and (obviously!) Donna Amato don't have beards, Marc-André Roberge doesn't have a beard and, whilst I do have one, I didn't have it until almost nine years after I first discovered Sorabji's music and it is in any case very short. I cannot comment on your level of intelligence (which is the other factor that you mention).
Few of Sorabji's works are other than difficult to perform, but then there is difficulty and difficulty - and no one in his/her right mind would pretend that the Brahms or Rakhmaninov concerti, the Chopin études, the Liszt sonata, some of Beethoven's sonatas and many tens of thousands of other works involving the piano are not also difficult. In terms of general technical difficulty, the "easiest" of Sorabji's piano works are (in chronological order but in no particular order of difficulty)
Sonata no. "0"
Désir Éperdu
Quasi Habanera
In the Hothouse / Toccata
Fantaisie Espagnole
Sonata No. 1
Trois Pastiches
Prelude Interlude and Fugue
Fragment (Prelude and Fugue)
Fragment for Harold Rutland
Pasticcio Capriccioso
Chromatic Fantasia transcription
Quaere Reliqua Hujus Materiei Inter Secretiora
St. Bertrand de Comminges
some of the 100 Transcendental Studies
Prelude in E flat (Bach) transcription
20 Frammenti Aforistichi
104 Frammenti Aforistichi
Variazione Maliziosa e Perversa
4 Frammenti Aforistichi
Passeggiata Variata
Passeggiata Arlecchinesca
of which almost all have been recorded at one time or another - that's at least four hours' worth, I would say. OK, it's a relatively small proportion of his piano output as a whole, but it's hardly insubstantial. Anyone capable of playing the last five Beethoven sonatas, the Chopin Ballades, some of Albeniz's Iberia, the Rakhmaninov preludes, the Busoni sonatinas, etc. should be able quite comfortably to manage any and all of the above.
Until relatively recently, it was difficult or impossible to get hold of copies of these and most other Sorabji works and many of them existed in manuscript form only (not the best source material from which to prepare performances!), but all the once out-of-print publications are now available again and an increasing number of his previously unpublished scores are now being edited and typeset, so at least there is legible material with which to work.
Best,
Alistair