This is my ramble on how I think vampirism works.
It’s basically energy working, which any human can learn to do, so, to an extent I agree with you when people “choose” to be “vampires” it’s normal people being poncy plus occult techniques.
I don’t think vampire that choose to call themselves that are particularly charming, intelligent or persuasive, personally, but neither are narcs except in their own minds as far as I can tell. Oily, but not naturally charming.
I do think there is such a thing as real vampire, and these are unfortunates with broken energy systems that mean they, like astral parasites, can’t effectively process non-human energy sources. They don’t naturally replenish their qi enough from food, sunlight, the moon, the cosmos. Not enough qi means declining health and sickness. These people must get energy from other humans or literally die.
I actually find the current trend in the occult to call yourself a vampire just because you figured out some energy working kind of insulting to real vampires who really struggle with a debilitating disorder.
So, yes, fake occult vampire are pretty narcissistic just be calling themselves that, they seem to want the cool points, and want to think what they’re doing is special, that they’re “apex predators” and wrap this whole romanticized crap around it, with no regard to or sometimes even the effort to research the people who actually suffer this. E.g., Michele Belanger.
Real vampires, are no more or less narcissistic than normal people.