My best knowledge of the Goth culture - tuly comes from 'South Park' - the eposides that had the Goth kid deal with the vampire kids or deal with the Emo kids. I know some actual Goth people but what I got from them is still summed up best by "South Park".
Goth vs Vampire
Something like:
"If are truly depressed, and smoke and drink coffee constantly - then you are Goth"