I am going to say Harley Quinn as she is an interesting character and a babe.
I can't think of anything that has actually made to cry from any Batman I have ever seen or read.
Any scene from the 1960s television series. Any single scene. They are all funny.
The Batcave as it is the bestest and biggest man cave of all time. I love the Batcave in Batman v Superman. It is awesome and also huge!