I feel portrait oreintation may have suited the subject better than landscape plus maybe a little more background blur, but good colours and well exposed image.
Have you tried concerting to B&W, it may look a whole lot different?
Given that you looked like you've shot this in bright sunlight I think you've done a good job in getting the exposure right. I agree with Steve that a portrait background would work better. I like the colour version although a B&W may yield an interesting photo as well if you tweak the colour highlights.