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.
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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.