(one's) heart's desire
Something one very much wants or needs. After my six-month tour in Iraq, my heart's desire is just to see my husband again.
your heart's desire
LITERARYIf someone or something is your heart's desire, you want that person or thing very much. Note: The heart is traditionally regarded as the centre of the emotions. He was extremely dishonest in his efforts to achieve his heart's desire.
your heart's desire
someone or something that is greatly wished for.