A true rocker doesnt listen to music of any kind unless it is rock or unless its a combination of rock and something else.
They wear stuff like studs, bullets, spikes, combat boots, shoes, jeans, band t shirts , leather gloves, camo pants, etc.
You never know what kind of hair a rocker may have. It could be an emo fringe (and yes, emo is a genre of rock) or it could be a mohawk. It can be long or short. Really it doesnt matter all that much.
Some wear black nail polish and eyeliner.
Some of you might say that this is a label, it could be, but really it is just a way of life.
There are rock subcultures of many types like goths, punks, emos, indies, metalheads etc. or they are simply rockers. But this is really my opinion on what a true rocker really is. The majority of rockers will find there selves with hip hop people like rappers, r&b people, reggaetons, etc. Mostly bc of musical differences.
And to those that dont agree with me you are obviously blind.