well, the expression is nice the composition works so it's a nice shot.
I can say this that might help you improve - or maybe not, you did not say if you shot this through glass - but it's a bit blurry, and I think too warm. I think your exposure was off a bit too. meter the black and then add 1.5, or open up a stop and a half, or spot meter the green and shoot that exposure - green leafs are almost always about 18% gray, or at least they are middle tone. . . .