It's pretty. Definitely one of my favorite picture with those two I've seen on dA. I really like the coloring, the pose and the general atmosphere - a little grim and sad, but also comforting, because they have each other. I can easily imagine that this scene takes place shortly after the battle, when everything what had happened in past days starts to sink in - everything what they were never trained or prepared to. Hawkeye looks so unhappy and worn out, obviously pondering over the horrible time when he was under Loki's influence and his deeds. Fortunately, there is Black Widow to suport him, who fought to save him and bring back to sanity.
I like Clintasha too. Don't think this pairing is going to be in the films, but hope to see more of them working as the team inside the team in Avengers 2.