When speaking to people about my passion for composing music I say that if I didn't pursue art and design as a career it would have been music. But such things are hard to pursue with no formal training. I've dabbled in piano, guitar and percussion instruments, all being essentially by ear but I've been able to use tools to compose digitally and even compose for past projects.
This is another creative outlet. One that I like to think of as being akin to sketches or paintings but with sound. Melodies and harmonies form at the most random of times so these have been composed on commutes, early mornings, late evenings or whenever they strike and I have to get them out, play with them, and see if I can being them to life. No particular genre, no particular style, but always fun and calming.