The big game changer for me was learning improvisation. When I was 15-17 I spent most of my free time for about a year or two first learning enough piano to improvise meaningfully (I took lessons for that) and then losing myself in just trying things out, developing a sense of which techniques evoked which emotions, spending untold hours finding pieces – chords, turns of musical phrase – that did something, something specific. I built a musical vocabulary that way, one that loosely translates to emotions. And the foundations I laid then still serve me well now, more than 20 years later. I'm happy that I did this on my own, without deliberately analysing other people's work (at least initially.) It gave me a sense of discovery, and ownership, and made me feel like it was my language, my emotions that I was developing.