After tackling (and mastering) styles, I'm heading back to brushes. I can load them, I can use them, I can teach about them; but I don't tend to create them. And I've got many Dover books on CD that have copyright free graphics on them that I could use.
Part of the reason I haven't been using the Dover graphics is the Dover application for previewing them is clunky and slow. Then again, the last time I was trying to use my Dover stash, I was working with my old laptop, with the failing CD drive. Time to go dig into creating my own sets of brushes!