I used to find it kinda strange how metal fashion was a lot like goth and punk fashion while those groups were supposed to be at odds with each other. I guess it's just outcast attire, like how The Hell's Angels were hanging out with the hippies for a bit.
I dress used to be band t-shirt and dark-blue jeans. Now it is light sweatshirt and dark-blue jeans. I don't think fashion is important. I used to have fun going to metal shows wearing bright tye-die CSN band shirts with "if you smile at me, I will understand..." on them.
That being said, fashion DOES say something about you to people. I just don't care what idea people get about me. The people who know me know what I'm about, and they understand it a lot better than any fashion I could pick. The people who don't know me... well why the fuck would I want them to know me? Those people suck and they can think whatever about me.
I do have mega respect for the dudes who wear the right stuff. Metal has a great sense of outcast and satanic style. But at the end of the day I have to acknowledge that fashion is at least partially superficial and so it can't be the only measure of anything or anyone. That being said, I am a superficial person.