Singing has shown it's place in time. Ever since vocal talent was discovered, the voice has been the most powerful instrument because it's the only instrument attached to the person. It displays talents not found in a pianist or guitarist. The voice brings stories and experiances into the song and allows the listener to imagine the scenario like you did.
Singing makes me very happy although I have never been great at it. Five years ago i volunteered with my forth grade class to sing christmas carols for the elderly nursing homes. It made my myself and the people we were singing to very happy and be filled with the christmas spirit.