Do we aim for the three songs that create the foundation, the building blocks of who we are?
And if this is the case, are they the three songs that have resonated in our lives the longest. The background radiation of our lives? (If you listen very closely when you look in somebody's direction you can hear their music coming through ...?)
Or do you pick the three that represent the different phases of our lives? Childhood, HS/College, Adulthood and the like?
Or do you go the route of three portions of our dynamic human nature? As in Ego, Shadow and Archetype ...?
And perhaps it was too difficult to break the integral parts of the musical you down into three parts. This is OK, too, but you will have to pay for it.
Whatever path each of us chooses individually, this is an exciting experiment and a window, hopefully, that gives us an ocean view of each others' soul ...