Yes, 1000 hours seems to be a dark click. At 1004 hours flying time I was a bit too casual flying a Tomahawk, and had my first dark click. It was the first time I realized that my growing casualness or complacency had lead me to darn near wreck a plane, and I had the experience to recognize that that had nearly happened to me!
Now, with a lot more experience than that, I'm looking over my shoulder a lot more, and seeing how many things could have just gone wrong, but happily didn't. For me, the bliss of ignorance is way behind me!