It was a nice touch... BUT WHY IT HAD TO BE SAMARA!? It pisses me off that every time there is some interesting character in the game, I can't romance her and have to settle for the sub-par romances. Bleh!
All the details here are lovely. I adore the palate you chose, and the lighting is spot on.
The only little thing that bothers me is Samara's pose. Her back seems too arched, and her feet don't look like they're going to support her weight: she looks like she's about to tip over onto Shepard.
But like I said, everything else is wonderful. Great job.