In the wise words of Voltaire, vampire Goths are "essentially, romantigoths with fangs." In an earlier post I have discussed the relations between Goth and the vampyre subculture, but just to re-cap: vampire Goths do not believe that they are vampires. They are simply Goths with a strong interest in vampire lore and the 'vampire aesthetic', although they may or may not also be affiliated with the vampyre subculture.
Vampire Goths are not to be confused with the new generation of vampire fans as inspired by Twilight - vampgoths come with considerably less sparkle, and are more likely to lust after Lestat or Drac himself rather than that bouffant-haired ponce Edward. Other (dead) giveaways include sumptuous period clothing as opposed to cutesy jeans and Twilight-logo-patterned Converse; elaborate and elegant make-up instead of heavy eyeliner and a sullen pout. Let's face it - there's not much that's dark about Twilight.
Sometimes vampgoths have been stereotyped as pretentious; adopting British accents, speaking in Ye Olde English, wearing sunglasses indoors and generally doing their best to convince the general public, Goth and otherwise, that they Really Are Vampires. However, most vampgoths don't take themselves too seriously, and merely indulge in vampy cliches (red wine, anyone?) because they enjoy it and to amuse themselves. As with Goth culture itself, having a sense of humour about the whole thing prevents a Gothling from becoming a living, breathing (or not) media stereotype. As I have previously mentioned, for many Goths, vampires are entertaining - vampgoths are simply taking this one step further (vampyres could be described as taking it two steps further).
Speaking of stereotypes, you may also find vampgoths reading Anne Rice novels (or magazines such as Bite Me) by candlelight, watching Dracula, or relaxing on the chaise longue sipping red.... vine.
A large percentage of Goth bands have released at least one vampire-related song (what's that famous one again? Ah yes... Bela Lugosi's Dead) but especially vampire-friendly Goth (or Goth-related) bands include Nosferatu, Theatres Des Vampires, The Beautiful Deadly Children and Blood Lust.