This is my slant.
We of all the millions creatures on this Earth are the only ones (THE ONLY ONES!!!) that have the power of self determination ( free will, the true gift of creation ) This free will consists of two forces 1:Conscious (spirit) and 2: Ego ( individuality ) The Ego is for this life only to assist in gaining experience but the conscious goes on. Our conscious (spirit, sole) never gets angry, drunk, stoned, ect. It is here just gaining experience. Why? If we are to evolve into an enlightened being then we must be able to answer any question and to do that we must have experienced all situations.
As said earlier in this thread if our previous experiences (memories) where to be known it would effect the purity of this experience, for example it would be good to start a new relationship base on the it pure merits but unfortunately previous relationships always have a negative impact (baggage)
We are as part of creation as a drop is part of the ocean. Just experiencing what it is like to be a drop.