Joyful versus Tender - which wins your heart?

I was shooting some editorial work for a designer friend using my own kids (not recommended.) At the end of the shoot they were relaxing on the sofa, and I shot off about 10 frames. They must have been warmed up because they hammed it up and the next moment relaxed into a sweet and open moment.

For each child there is more than one authentic image that represents them. When I sit with clients to look at their images they often choose the happy image, but what strikes your heart most?