My latest 3 servo DuckBot is asymmetrical. What I mean by that is that it is slightly balanced more to the right than the left – and because of that it is able to do some things that it could not do if it was perfectly symmetrical. It can balance on the right leg but not the left. After it falls it can roll over in one direction to get up but not the other.
This makes me think that perhaps the reason humans are right or left-handed generally is because it is more economic with brain management of body movement. Takes less storage and neurons. And my robot can compensate by first moving itself to take advantage of using the right-sided ability to recover from a fall rather than having to build and store the code to stand using the left side.