I have a feeling that making films turns out to be well worth the effort for some people, but to date, I've not made anything that I would think is worth the time and energy expended on the project.
The writing is the easy part, for me. It hits me in a flash; I put the story on paper, in some level of detail; I sit on the script for a month or so, doing my best to forget about it; and then I return to the script and make tweaks as I need to.
It's really that simple for me. Always has been.
Making the film, though... that's another story altogether. Reminds me of making a song that was written on acoustic guitar into a full-blown arrangement in the studio, only more torturous. There's a billion more things to think about, it's more expensive, it requires more people to help out and do it right...
Oh, and thinking visually is not something that comes naturally to me. Not like thinking aurally (and that's not even something that I feel like I do well).
No, what I do is tell stories. Thank god I've got a lot of friends and acquiantances who know all the other parts of the equation.