What is it about stories? Why are they so easy to listen to? Why are lectures so... not... sometimes... ?
We haven't got answer for those, but stories have been big in the Christian community since the early days. From Jesus telling parables to the testimony of early Christians, true testimonies shared have always been a powerful way of introducing people to the Christian faith. As Peter writes, we should 'Always have your answer ready for people who ask you the reason for the hope that you all have.' 1 Peter 3:15