Writing - Magnificent Obsession?

I consider myself a writer. Then I read a blog or article where someone claims real writers are those people who have to write. It's a passion. It's impossible for them not to write. Most of them have been writing stories since childhood. I think that's not me. I can go long periods of time without writing. Some days I have to force myself to sit down in front of the computer. Once I actually start writing, I love it. So what does that make me, a fake writer?

If writing is my hobby rather than a career, what do I call myself, one who dabbles in words? I don't consider it a career because I already retired from a career, and I only write novels which will never make the New York Times best seller list. They aren't gritty, cutting edge, thought provoking, or heartbreaking.They are simply entertaining.

So what's the criteria, a money making job, an all consuming passion, or is it simply being good at it?  If you draw or paint exceptionally well, you're an artist, even if it's not financially rewarding. If you compose, sing or play an instrument, you can call yourself a musician, even if you don't do it to the exclusion of everything else.

I may not be Hemingway, but I believe I'm good enough at stringing words and phrases together to weave an entertaining story to be able to call myself a writer.