Two things would make this a better image: Better head angle (that is the #1 concern here), and remaval of the bright circle in LLC. Otherwise exposure and sharpness, and colours look good. With that shutter speed and focal lenght I assume you had a tripod, but I would still raise the ISO higher to give you better SS and thus lower your percentage of "trashed" images due to various types of blur (camera shake, subject motion blur).