>>4219605It's the only setting that doesn't artistically affect the photo. Aperture affects the depth of focus, shutter speed freezes motion or not. As long as your noise level isn't annoyingly high it won't aesthetically affect the photo.
Photographers are some of the most gear and technique obsessed artists that they forget that your camera and its settings are a tool. It isn't an exercise in correctness, they're tools for expression.
Do you want to catch the water frozen in time with the droplets visible or as a smooth surface? Change your shutter speed. Do you want to frame the subject in isolation or in context? Change your aperture. ISO is there to help you make it well exposed, but you can always change it in editing later.
