The traditional rule in landscape photography is to use a longer exposure when photographing waterfalls. This makes the water look smooth and gives a photo what I used to think of as that "professional" look. While a half second shutter speed or so is still my go-to method, I don't look at all waterfalls the same anymore. Definitely some of these taller ones have a lot of interest in the cascading water that only a fast shutter speed can capture. A slow shutter speed would make the entire column look completely uniform, but you can see that there is some beautiful detail in the cascading water that adds to the photo. This was at 1/160th second shutter. Another advantage of doing this is I can shoot hand-held,
which means less setup time and greater maneuverability of the camera.