I think there's a pretty clear superiority complex present. Astarion is certainly predatory, we know from one of Larian's shows that when playing as him you can drink a companion dry in the night. And he considers his trump card to be allowed to stay in the party, what "a powerful weapon he is", even if you want to argue if the game backs that up, similar to how, for the player, he's obviously a vampire, what we know and what might be true in the game aren't necessarily the same.
The discussion on folkloric vampires is interesting but it doesn't really help us considering that D&D, while it takes from many sources, is predominantly a Tolkienesque. As far as vampires go, that we haven't mentioned Strahd is criminal.
Vampire's can serve a few roles in the stories they're in, from elites out of touch with humanity, effete and unconsummatable passion, to drug addiction and passion as overriding animalistic need. I don't know if Hollywood was actually the beginning of the Romantic vampire, but I think that aspect has developed, thanks to YA, into its most visible trope, but if the question is if Astarion follows in this trope, I wonder if people playing and re-playing the EA doesn't exacerbate every characters foibles, Astarion being our, effete, apathetic, and unsympathetic chaotic evil character will suffer the most.
