When you go to add a picture to anything, you get a big pool of all your pictures to choose from. But after a while, there get to be a LOT of pictures. It would be really nice to have folders for the pictures.
For example, I would use a folder for "headshots" that have my characters and one called "maps" with those images and so on.
Tie this to the other comment I just posted and think of it like this. Have a place to manage your pictures, which is where you go to delete them. That is where you add folders / move them around / etc. Then when modifying the picture in a specific page or element, you are not messing with the source files of your pictures.
You could even make a Media module what like 1 GB free and then a cost for more than that or something along those lines.