To be able to sing the song of your life before the whole world without anyone judging you. This is how I imagine heaven to be, how each of us will get our chance to sing, the sound of our voice no longer dependent on our vocal chords, but on the condition of our heart.
We each shall have our moment when everybody listens to our song, to the sweet melody of a soul that can only come from the joys and tears we have experienced in life. Nobody else can sing your song for it is as unique as you are, and as special as the life God has given you.