i usually nod back if someones nods first. Most the people that nod to me are rocker/punk type people. So i nod back to them. I guess in a way its more of their whole appearance, then just their looks(when i think of looks i just think of faces)

oh and i nod whatever way the other ppl nod. I usually dont nod to people...because wth?why would i want to? lol i dont know why anyone deciedes to nod to me?