My artform of choice has always been music, but amusingly enough a friend once called me a "visual" person and I think that comment wasn't too off the mark.
Ultimately, I exercised my visual muscles through software. I always paid attention to colors, and thinking about this made me think of how I centered the GoboLinux visual identity around its palette back in the day (2006: https://web.archive.org/web/20060218213031/http://www.gobolinux.org/ ). It was weird seeing that color scheme become a tech cliché for startups 10-15 years later.