Exaggerated the nose, the lips and diminished the eye size a bit
My head's emotion is happiness. This is is shown in quite a few ways but notably through the big smile, the thick eyebrows, the big ears, and the up-titlted hair. First, the big smile was exaggerated (bigger and longer) to make my head "grinning from ear to ear". This is also the reason why I made the ears so big (to emphasize the expression). I also made relatively thick eyebrows that point upwards to indicate the increase in mood. Likewise, I gave it an Elvis-styled haircut to represent excitement and flamboyance. In terms of colors, I made the hair a blond/yellow color, the color commonly associated with happiness. I also made the skin acoloe a yellow-ish green to give some contrast to the hair. All these features come together to make my head a magnificent representation of the emotion of happiness.