I'm going to police your confession now. I'm pretty sure that reading Sandman in its entirety fully qualifies you to cosplay as Death, even if you'd largely forgotten it by the time you did so. I hope my mansplaining to you the invalidity of your self-invalidation helps.

Also don't forget how, besides kindergothen and baby bats, the goths complain about perkygoths, mostly meaning girls who model their style on Death of the Endless!