Eternal Sunshine of the Spotless mind is another Charlie Kaufman product. The same bizarre imagination that produced Being John Malkovich and Adaptation.
I have always been awestruck by this guy's wizardry with the art of plot-development (or should I say dismemberment?). Which reminds me of the time I bought a VCD of Being John Malkovich. I had a couple of (ahem) friends then, who had the temerity to borrow it and then to say that the movie was perverted to my face, loooking me over as if I were some decadent pervert myself.
Well, they were right, because I was blown away by both movies Kaufman wrote after that.