Being comfortable isn't the way to learn to expand your abilities.
When I write a book, I'm making it the best book I can.
I do like to explore evil characters in my books.
I held a variety of jobs - most notably ten years working in universities - and kept on writing.
I do have to earn a living, so I'm conscious of probable reactions from readers, but the most important one is still the awareness that if I'm not enjoying a story, the reader won't either.
Contrary to what many writers imply about the process, nobody forces a writer to sell his work to the film industry.