Rose - you're a scanner. I know you know this
. You're just being you! Of course you're not so interested in ghostwriting anymore... that's ok. Been there, done that, on to the next thing. You know, I think maybe the people with the most to give to the world are scanners... you're made that way so that you get to touch many people's lives in a myriad of different ways!
I for one would love it if you wrote down the scenes you observe and the stories you invent about people. They don't have to evolve into full blown plots... they're snippets of your day and the world around you with your unique point of view. I think it would be fantastic.
And even if you do write a full length screenplay, it doesn't have to be a huge action-packed, dramatic and detailed thing. To me some of the most beautiful movies are ones that look at a single idea or moment in a person's life and how that changes them.
Oh, and do the Artist's Way with Angela! Julia Cameron is fantastic (and so of course is Angela!).