I think Lorraine has pretty much said it all. Compositionally it’s great and his expression is great, so well done on capturing it. When all is said and done, shooting people is usually about capturing a special moment and you’ve definitely done it here. The shot does need more contrast, but nothing a quick levels adjustment wouldnt fix – drag in the black point quite a bit.
As for the blown sky, ideally it wouldn’t be there, but I think cropping it out will change the shot for the worst in terms of feel and composition. It’s too late now, but if you get a chance to shoot something like this again, either try and avoid sky in the shot or use flash. That way you can use the camera to expose for the background and ambient light and the flash to expose for the subject.