The natural assumption that ones own musical taste via iPod is superior to another's in an environment where upon musical choice is required.

Someone who is possessed by clout chasing. The original human is now gone and a demonic entity that feeds on clout is all that is left. An empty shell with no control of their actions, forced to blindly react to situations they think will bring them attention.

an attitude with headsets or earbuds... oblivous to the world around you while deep in the bowels of your 20 song mix.