I'm currently doing a Dark Urge run and as much fun as I'm having with it, there are some thing that make me go... uhm???
So, Alfira came over and wanted to join our group. In his sleep my character murdered her in the most horrendous way possible. He gets rid of the body but there's still a huge sacrificial circle of blood on the ground.
Days go by and no-one asks about Alfira or the circle. My character decides to 'rescue the grove' because from all the information he has he feels that Halsin is his best bet for a cure. Then comes the party at the camp and still no-one is worried about Alfira and nobody comments on the blood circle. Also, this circle is right in front of where Astarion is standing and there's not even a snarky comment?
As you can see I'm still early in but the lack of interest surprised me a bit. That said, I do think that after playing four 'good' characters it's a lot of fun to pick the darker or more selfish dialogue options.
