I am not asking this question as one to be answered, rather as one to be pondered quietly within yourself.
Many will answer this question with something related to love, money, fame or one form or another of material possessions. For some, this may be as far as the thought is capable of going since it is the truth. There is no right or wrong answer.
Others may find surprising insight after sitting with questions like this. Sometimes we are blinded to our true wants and needs due to our fears and a vast number of societal influences. We often find that rather than what 'we' want, we seek what others have convinced us we want.
Every day we are barraged with images and words telling us that our lives will be more complete with whatever is being pitched. Billions of dollars are spent each year telling us we need more. Softer skin, less weight, more hair, better sleep are just some of the thousands of messages we receive each day.
All of these things may bring a degree of happiness. For those looking for something more fundamental, I argue that no matter how many 'things' we now have, we need be looking in a much deeper place. We have all heard that money does not lead to happiness. At the same time, I have never seen proof that poverty does either. There must be something more.
Each of us has to answer this question for ourselves. Look beyond the standard answers and see if there is something else. You may be surprised or perhaps not. Either way, once you find 'your' answer,work to make it reality.