I'm up to Op.50 with the piece I am just finishing now (although this includes arrangements and orchestrations of other pieces, so my total opus of entirely original compositions is more like 30).
The Sun Rising (2010/11; orchestra): Until a few months ago the longest piece I'd completed, at 13 minutes, and my most successful as it reached the final of a national competition and was premièred in a public concert. In terms or personal significance, it taught me a lot about handling a longer form coherently and about using more original orchestration, as well as techniques such as writing sustained fast music and developing climaxes. It was also a major confidence boost, not just because of its success but due to the feedback from players and audience and the knowledge that I'd actually completed such a large amount of music in a style I wanted to write in and which managed to present an original idea.
A Child of the Snows (2012; baritone, chorus and orchestra): OK, cheating a little as this is still (as of 13th July) around 20 bars incomplete, but I already feel this is my best achievement on almost all counts - handling of structure, instrumental and choral textures, setting the meaning of texts, use of a solo voice with orchestra (first time doing this) and just completing such a massive project - 27 minutes in a single movement. The première will take place this December.
Midnight's Bell (2010, piano): This started life as a short chorale in another composition for harpsichord, but in a few days became a fairly substantial piece in its own right, in which I explore different textures available on the piano. Apart from feeling that the ending is too long, I was very pleased with the result., and it was a step into using longer forms than I had previously written.
If Ye Love Me (2008, double choir): Half-arrangement, half composition, this was a re-imagining of Tallis' hymn with a second choir as a contemporary background. Whilst not an entirely original idea, I felt I carried this off well.
In the Old Castle (2009, chamber orchestra): An orchestration of a Dvorak piano piece, but one of my most treasured achievements, not least for the warm reception it generated when performed. Whilst the music was not original, it was a noticeable step into developing a personal style of orchestration.
...And arts unknown before (2012, orchestra): Another 'quickie', done in a little over a week for a commission. It's neither my most original piece nor my most personal, but I rather like it and hope to expand this little fanfare into a longer choral composition in the future.