My favorite's probably the angry guy I've been calling the "Fffffffffairy". The idea sprouted from a conversation that I had with a friend about how drawing any kind of human with bug wings would turn them into a fairy.
The idea for the guy in the top right corner is that he's kind of a spoof of racial allegory in science fiction. Obviously the idea came while talking about District 9. Jokingly, a synopsis about a movie with aliens who built space-railroads and were addicted to space-opium (spopium), came about. They also make good food.