@Joe Moon, if possible, cut the chin even closer to the bottom of the cut. The ideal cut only contains 2-3 pixels beneath the chin and since in some sources, the person in the image may have a longer neck than usual, this would be quite difficult to achieve naturally. This video & this post display a simple technique of how to cut close to the chin and still display a bit of the collar.

Also try and brighten your cuts if necessary, this is a fair bit too dark. Also take the time to check for snow