Even cockroaches have different personalities, scientists find
http://www.theguardian.com/environment/2015/feb/04/even-cockroaches-have-different-personalities-scientists-find
...scientists will now attempt to determine how far down the evolutionary chain this extends. Jumping several layers, the next to be tested will be liberals.

Liberals are like a "Slinky". Totally useless, but somehow ya can't help but smile when you see one tumble down a flight of stairs!