I mean if you are a fan of him then you are a fan of him, but yes he is all feminine. Not a single thing right down to the way he speaks, acts, and carries himself is masculine.
It's not that I'm a fan, it's that he's not feminine. He's emotional. It's not the same, I don't see femininity in him. And even if Astarion has some feminine traits, it's not the same as saying "a Girl in a man's skin". Choose your expressions, he is still a male character, and this can be seen not only in his body type.
