Mind some nitpicks? :)

It's not possible to put a sector back into the piechart by clicking on it again. So once you clicked on any sector, there's no way to go back to the original chart state.

Using up/down arrows to change selection in comboboxes doesn't update the graph.

Tree Chart has no animation on leaf expansion/collapse, so clicking, for example, on Grandma results in the graph transformation that's abrupt and not immediately obvious. There's also no way to tell collapsed nodes from those without children (leafs).

Sankey Diagram could use some fade transitions to make highlighting less jarring.