presets are a time safter, i do many wedding shoots, and on average wedding shoot i take about 1500 pictures or more..
now of course i got about 50 shots in the church, then another 100 out side, then the rest at the reception at a different location.
So each place my images are going to have different light balance , light settings some with just fill flash some with the flash is the main light.
So lets say i start working with the shots in the church, the light balance is going to be the same, the light situation will be as well, so all my images will have similar exposures , what i do is edit the first picture and save what adjustments i did to that picture in a pre-set, then each time i move on to the next image i first apply the pre-set to get the next image i'm working on to be similar at least to what i want then if needed make more adjustments.
This saves me the time to have to manually set each image with the settings, i even do them as a batch processing then move on to the next set where the lighting and situation would be different and so i manually edit the fist one and then save that preset and apply them to all the other image that where taken in that location.. it's so much a life saver, this cuts down my post- production time by 80% or more.
When you have to edit like 1000 or more images your going to want to use presets, even editing just 200 pictures, why do the same adjustments to 199 of your pictures that you just did to your first picture, that makes no sense..
Donny