Writing has pretty much always factored into what I do professionally, though not always the creative kind.
From grade school I always played lots of videogames and read lots of genre fiction, and I started writing fiction in elementary school (finished my first novel in 6th grade, and my first game mod, for X-Wing, in 8th). Always loved writing fantasy/sci-fi stories and making videogames, but never assumed I could make a living doing it.
After high school graduation, I started college as a CS major (always enjoyed and been relatively competent at programming) but ended up switching after a year and a half because the advanced math (such as Calculus) was killing me. Still a decent programmer, but I'm mainly on the scripting side of things.
My other strength had always been writing, so after giving up on advanced math I changed to an English major with a certification in Technical Writing. ProTip: Technical writing is about the only thing you can do with an English degree that actually pays. Or you can teach, but we all know what kind of salary you make doing that.
I graduated with a B.A. in English and Technical Writing Cert, then went to work revising employee manuals and writing training documentation for large companies for about 6-7 years. It got old fast, but it paid decent. Eventually, I heard about The Guildhall at SMU (a trade school for game design) and decided I really wanted to do what I was passionate about for a living - making games. So I quit my well paying tech writing job, took out a VERY large loan for grad school which I'll be paying off for another 5-6 years (thanks, US education system!) and got a Masters Degree in Game Development (did a thesis and everything) with a certification in level design.
Shortly after, I got my first big game development job, where I've been since, making stuff you play. A few years after breaking into the game industry, I finally started selling a short story or two, and shortly after that had my first novel published by a super small press. That got me doing the convention circuit and connecting with other authors and editors. I had a few more short story sales, got the rights back to my first book, ran it through a new editor and re-released it as indie pub, and that's where I am today.
My job making videogames still pays for everything, of course. My author career remains a very, very obvious hobby, at least for the time being. But who knows! If I one day make enough writing to support myself, I might then flip things and let my writing career support development of my own games...