We all like to be happy most of the time. Happiness is the most experienced emotion and many authors have talked about it at great length. Some of the most famous happiness metaphors are:
"Happiness shone from her face."
"Happiness swept over me with tiny bristles."
"Happiness pricked my side and cheeks then sewed me up in stitches." and
"I was a dancing leprechaun at the end of a rainbow with my pot of gold."