This may be a version of "confirmation bias" in that most people tend to like the first version of something they see, and see other versions as being "less good" since they are mentally acclimated to the first version. Really all three are pretty good, but like many, I voted for the first version I saw as being just that little bit "better."
I think to plebs like us the face in these sketches probably causes too much of an uncanny valley reaction. I reckon that helps explain the vote count, along with jlv61560's excellent point about bias.
