The preset automatically arrange brushes in alphabetical order, but most of the time you don't remember their names- you remember how they look like.

For instance, I have Simple Round and Airbrush, but they start with S and A. Just one hard edge and one soft edge though... So I have to rename them Simple Round and Soft Airbrush to make sure they are next to each other. Well, airbrush is soft anyway so it feels really weird.
It will be cool to have preset manager like Photoshop. This way you know your most often used brushes are on top of the list, instead of scatter around the list.