I'm curious: what do you find deeply creative?
For me, observing the world, it's the: "aha!" moment. Simply realizing that this made some pieces fall together. When I discovered GAs in 1989, I had a jaw-dropping to the floor, hit-the-library-right-now for 120 sleepless-hours kind of moment. When I understood Moby Dick to be the American Bhagavad Gita, I had a similar moment.
But, for when I, myself, create - it's been very rare. Probably because I am not a creative genius. At best, I am a poly-something-or-other synthesist. Applying Claude Shannon to evolution was about my peak.
I could say that my moment of creativity came when I was borderline losing it - certainly unstable - maybe insane - probably not recognizably sad.
What is it like for you?