I have one minor, minor comment on this pic. I wish you could have gotten all of the tree into the frame on the left-hand side. But that's in an ideal world, ya know?
You told us that this was just a grab shot and in those situations, you get what you get. And what you got in
this instance was really good! For me, the things that keep this from being just another silhouette shot are the great sky, the interesting shape of the tree, and the fence line on the left side. I even think it's good that you included a second tree in the lower right side. I think that had you not done that, the emptiness there would have thrown off the balance of the shot. Nice work!