I don't know about you, but the picture it paints is one of a fairly arrogant but also actually cunning and quite scary character that isn't a full vampire but certainly does come fairly close.
And I have to ask myself, do Astarion's features appear hardened and predatory? Is he actually acting like he thinks he's the superior character and the rest of the party is there to be his followers? Is Astarion in any way a master of stealth and charismatic cunning? Would I consider him a terrible opponent? Speaking for myself, I would answer all these questions in the negative. So for me, no, he doesn't really fit.
He's more of an emotionally unstable jerkface that happens to also be bloodsucker than a "vampire". Or indeed even a vampire spawn, as defined in Forgotten Realsm.
