When manipulating parts/sub-assemblies in a larger assembly, the 'Rotate Component' feature is useful.
However, it would be greatly enhanced if Inventor allowed a 3D mouse to also control this function. If there was a way to toggle between view control and part rotation with the 3D mouse, it would allow quick part insertion and alignment (instead of pressing 'g' and "pulling" the part into a correct alignment). I'd really appreciate this feature when working through fitment issues in assemblies.
Users rejoice, productivity increases, profits skyrocket.