Not sure about the category, buuuttt... yeah. Everyone I've shown has really liked it so far, and suggested I release it. So here you guys go!
It's pretty versatile. I've found it to be good for lineart, quickly sketching, shading things. Change the texture on it, it's like a whole new brush!
Comparisons are with the brush labeled simply "Brush" in SAI, the Pen tool, and the Marker tool (which I have no fucking clue how to use and it shows).
Settings, written form:
-Softest edge shape, but also works with second-softest. I don't recommend the harder ones though.
-Min size 30%
-Simple circle shape, no texture
-Quality 1, but pick whatever you want
-Edge Hardness 100
-Min Density 10 (mess with this number, it changes depending on your personal drawing style / pen sensitivity settings)
-Max Dens Prs. 100%
-Hard <-> Soft 100
-Density and Size checked off.