The people or personality we are having at the moment, is not really what we are, or rather a very small part of what we really are.
We are here in a sense to ‘experience’ things and from it ‘learn’ and ‘evolve’
which in a general sense helps in the expansion of the universe.
Each thing we experience is very unique, no two people will ever really experience the exact same thing, or have the same reactions, so in a sense it is a mass collection of data. (experiences)