Did I miss the scene from the trailer where he was kissing Dame Vaako? I was looking forward to a love scene and it wasn't there. Maybe they thought that if Riddick didn't have one then Vaako shouldn't either? In any case, they sizzled without it.
There have been some bad reviews of the movie, but I liked it and my daughter liked it. She really liked Vin and enjoyed the interaction between him and Kyra (while I spent a lot of his screen time trying not to pine for Karl.) Riddick is the role that made me like Vin Diesel, and his other movies since Pitch Black have been a let down. It's really nice to see him back where he belongs.
As for the story, I'm not sure why people would quibble about plot holes for Riddick if they didn't notice the huge gaping plot hole from the Matrix. Movie scifi just isn't as tight as the novel form.
Hopefully none of that was too spoilerish! Now that I've written this I'd like to see it again.