We all know certain Cybertronians have human-like features. Sentinel Prime's beard, Ironhide's nose, and others, even though they don't need them. Well, I have come up with an answer as to why this is: The AllSpark is supposed to be at least semi-sentient, right? What if it had observed Earth, and humans, before creating Cybertron and its inhabitants? Maybe the AllSpark made Cybertronians have beards, even though they don't need them because it wanted them to be more like humans. That would explain the noses, beards, eyebrows, and any other human-like features on any Cybertronian. I have a feeling that this will get shot down pretty quickly, but who knows!