So embarrassing admission time (mostly for you the viewer's amusement).
You know the avatar used by Erathia and others? The guy in the red hood?
It took me ages to figure those black things comming out of the hood are supposed to be braids of hair. For a while I thought it was cables. Admech right? But no, it wasn't that. What was it? And then I was gripped by the insane notion that they were tiny little deformed-but-muscular arms, flexing away. I mean, look at the horizontal one. Is that not a bicep right at the edge of the hood? But why are they black? Cybernetic ear-arms I guess. Man, warhammer 40k is wierd.
I eventually figured it out, though I still think it doesn't look much like hair, but now I can't unsee the little flexing arms. Which is doubly hilarious when paired with the super serious expression on the guys face.
This is exactly the thought process I had when I chose this avatar, and I also still see them as tiny grasping arms, leading me to pretend that this guy is an AdMech who just loves Utility Mechandrites - even his hair is made of Utility Mechandrites!