It's worth nothing, I continued my Mass Effect save, and I had previously romanced Ashley. Despite temptations, again the more I got into my character I really did enjoy the interactions he had with Miranda and the surprisingly endearing times with Tali, but ( on that playthough ) anyway, my Shepard stayed single.
So where as if I had romanced someone else, the picture would have been turned over, instead right before the final mission, there was a cutscene of my Shepard in his quarters, staring at the still upright picture of Ashley. He smiles a little at the end, and then it's time for the mission.
I dug it. A powerful and endearing moment.