I found it interesting to see how the algorithm distinguished a nose from an eye, especially in sketches that weren't trying to resemble a cat.
and ocean in the field
french horn funghi
I found this really useful for character design in the portrait mode - you could create a whole family of people that were clearly related from one photo.
I played around with the "How New Yorker are You" experiment, in which two players compete to be crowned the realest New Yorker by answering questions based on tweets that originated in NYC from the past year. The closer your responses are to the topic--and the faster you respond--the higher you score.