If they wish, I always advise to also do a “engagement” service: a nice way to tell their love story, but also an excellent tool to get familiar with the camera and with me, to experiment with photographic solutions in advance best and arrive calm and peaceful on your wedding day.
The truth is that no beautiful photo can be built only with technique or only with improvisation: in the first case, we would have perfect and cold photos, unable to speak, to tell, to return emotions. In the second case there is the risk of being confusing, of losing important elements, of never having that photograph capable of striking, enchanting, moving.