So Cedric,
Sharpness not really right? You want to think about things? Look, this image cannot be perfected or you kill it! Art must be uncompleted and yet have sufficient life to live without you.
You want to explore more? Let's do just that. Don't change the sharpness, that helps the reality edge this picture balances on. Instead, try cropping away the lower part of the image just below the piles of leaves on the right edge. It becomes even wider and extends the ideas in the image. But then that's only since you question its perfection. When you try it, it will seem like a good idea since it pushes your boy close the right position for the "rule of thirds" or the Golden Mean". When you do this, however, the boy is no longer central in the height of the picture and he is no longer so ambiguous! I think you could go on like this, doing artistic corrections, but you risk the picture itself!
Frankly, it's a very special image as is!
Asher
I hope you did this on a full size file so it can be printed!