Although PowerPoint allows user controlled movement through animations on a
slide by clicking the mouse button, the order is pre-set.  The program would
be far more powerful and useful for interactive presentations if a field
(like a textbox or picture) could be clicked on leading to a specific
animation sequence.  Ideally such control would extend to diagram animations
as well (at a minimum the inclusion of an option to ungroup diagram elements
would be helpful).

Although a hyperlink workaround is available, it is incredibly unwieldy to
make a new slide for each "animation".