One thing I do like is how they animated Tavs face when Astarion says: "First we'll take Baldur's Gate then we'll take the world. We'll dominate it until the sun itself melts and then give ourselves over to the night." It then pans to Tav who is smiling wickedly and nodding slowly. Looks like someone do get this romance.
Also when AA bends over Tav in one of the kisses it sounds like he is doing a growling-hiss, which if that is true is very well done. Makes it feel like Tav is kissing a Vampire Lord.
Kind of makes it more infuriating that Tavs face is like that and ruining the moment totally.