I think that final scene between Barnabas and Josette must be among my top ten Dark Shadows scenes. Josette makes it seem so absolutely right that they should be together, and we know that it is now so wrong.
When Barnabas talks about the very little humanity left in him, it seemed like a physical thing - as if some very small percent of his body were still human, and being eaten away by his vampire part.
Then we get Angelique, and there is zero humanity left in her. Before she died, the humanity in her wanted to undo her curse, but after she died, the curse took over her. She made a deal with the devil, and now he is taking his payment.