I hear superficial charm is a prominent trait of the sociopath. My applause for the writers, judging from player reaction, Minthara and Asterion have that in the bag.
Yes, Astarion is like that. And he has a lot of female fans who love him just like that. But we do not say that he is an absolute evil, because he can be friends with us. Minthara is the same for male players, but a little bigger and more difficult