Hello!
At the moment I'm study Beethoven's piano sonata "Les Adieux", Bach's WTC book I n 14 F#minor and book II n. 18 G#minor, Chopin's n. 12 op.10 and many other things such Clementi's etudes Moscheles and so on...
What do you think my grade is?
Well, I'm not very familiar with piano grading systems, but I suppose that you are above ABRSM's Grade 8. "Les Adieux" is an advanced sonata, ranked as a LRSM and FRSM piece (above Grade 8, there is DipABRSM, then LRSM and finally FRSM) at ABRSM, as well as Chopin's Etude Op.10 No.12. Bach's No.14 from Book I is included on DipABRSM. As for No.18 from Book II, I don't know. Possibly, between Grade 8 and LRSM. Finally, Clementi and Moscheles aren't mentioned on ABRSM... I wouldn't like to tell you about them, because I may be wrong. However, the pieces you're studying are generally on LRSM.

I'm sorry but I can't explain the grading system of ABSRM, for this reason have a look at the official site:
https://www.abrsm.orgwhat do you think I could study after them? Chopin's polonaise n.8 in Ab or ballade in G minor? other suggestions?
I believe that
Chopin's Ballade in G Minor is a good choice for you and an astounding and really challenging piece! Also, if you'd like to play something by
Chopin, maybe you could choose one of his
etudes (one of your favourite). I don't think that you start playing one of them, providing you can play Op.10 No.12. Furthermore, other wonderful pieces are:
Polonaise in F# Minor Op.44, Polonaise-Fantaisie in Ab, Fantaisie in F Minor, Berceuse in Db. Well,
Polonaise in Ab "Heroique" is very difficult! But it's worth even trying it! I'm strongly in favour of practicing pieces which are more advanced than you can handle. I remember when my teacher told me to buy Chopin Etudes. I knew that this was a great step for me. I thought I couldn't play any of them. But only after practicing them, I realised how much beneficial they were both for my technique and my sense of music.
What about
Beethoven's Tempest (if you like it, of course) which is a beautiful and advanced sonata? I also love
Op.3 No.2 in C and
31 No.1 in G.Other pieces:
Chopin - Prelude Op.28 No.24 in D Minor (I really love it! Although it has advanced technical difficulties, super fast thirds on the right hand,...)
Ravel - Pavane pour une infante defunte
Ravel - Jeux d'eau
Debussy - Les sons et les parfums tournent dans l’air du soir
Debussy - Pour le piano
Brahms - Rhapsody in G Minor Op.79 No.2
Prokofiev - Visions Fugitivesor some
prelude by Scriabin or RachmaninoffAlso, you can read this which contains a Repertoire List:
https://www.abrsm.org/fileadmin/user_upload/diplomas/performance/performanceDiplomaFull.pdfThat's for now!

I just can't think of anything else!...
Hope I've been of some help,
Evitaevita.
P.S. As I said, I don't know so many things about ABRSM, but I thought I should tell my opinion because nobody else has answered till now...
