I started writing when I was 13 (not a huge accomplishment, because I'm only 15 now, but whatever) and I don't think I've gone a day without writing since (even if it was for an English assignment). I want to become the best writer I can be, but just keep writing as a hobby. I dont think I'll be good enough to write for a career, but I'd still rather be a biologist, and write at 4am, when I can't sleep. 
Writing is the one thing no one in my life knows about. And it will probably stay that way until someone hacks my email...