I tend to create custom brushes on the fly when needed. Truthfully, I find the regular brushes most adequate (with a few tweaks perhaps).
Although nothing that special, these are custom brushes I have created for specific or general-use tasks that I regularly use for both Clip Studio Paint—now my preferred illustration software choice—and the venerable indispensable digital workhouse that is Abode Photoshop (albeit the antique 2007 CS3 version I still use).
My brushes are free and can be used without credit—never expected, but always appreciated—but please do not redistribute; instead please consider directing to www.artofgladstonetibbs.com/brushes where up-to-date versions of my brushes can always be found. Thank you for your interest.