It can serve as a remedy for deathly fear and depression. I never concerned myself with developing a personal style. If my music expresses something like a personal language, it is more a result of my limitations. There are some things that you write down and others that you don't, simply because they are not in your head. I think of harmony, melody and rhythm as the main parameters of music.
Instrumentation is an important aspect, but it remains an extra.
First of all the notes have to be in perfect working order. Otherwise it won't amount to anything. On this point I am adamant. All that whining about textural sonorous fields and special instrumental effects bores me. Instrumentation must correspond to the structure of the music.