This was an interesting topic I hadn't thought about previously.
I like the Goth look to a limited extent, e.g. since I like "Forever Knight," I thought the Goth nightclub for vampires was effective and well-done on that show.
A little "Goth" goes a long way with me, though ... my reservations regarding the vampire connection are if the look overwhelms the concept of the vampire, or if it replaces older, more traditional models.
I have more reservations about people who pretend to be vampires in real life ... to me, vampirism is fantasy, and people who adopt this as a lifestyle as if it were reality and not fantasy sort of spoil the vampire concept for me ... but to each his own.