Having fun in what you do doesn't mean you're not doing "serious business."
This is true for writers, artists, musicians, athletes or anyone who 'seems' to have a much easier job.
As a writer, one of the things that I've learned is that you can't just wait for inspiration. It takes a lot of discipline, planning and hard work to produce quality content and to be heard in this noisy world.
You may have a job that doesn't sound as glamorous, but in whatever you do, have fun, give your best, and treat it as serious business.