FallingHorse, there is a fairly golden rule about keeping your
shutter speed equivalent to or greater than the focal length of the
lens you are using when hand holding to avoid "motion blur" and it appears that you have broken that one straight up with this shot. Other than that a bit more careful
metering to avoid the hot spots on his left forehead and cheek area would have given a cleaner image as well as introducing a little darkness to his left side which as a bit of contrast may have suited this shot.
Go out and get the same fella to pose more for you, buy him beer if necessary as it is entirely justified for your learning curve in portraiture.