When I'm drawing I like to use a really fine point. Some of my pens have been hacked away to almost nothing, but they give the most fantastic line quality. Unfortunately, the scratch of a nib on paper isn't something that comes across into the digital world. We can, however, strive to achieve those lines we've come to know and love.
The brush I made tonight comes pretty close to matching one of my favourite inking pens, and was made by a complete fluke of trial and error and button mashing. It works beautifully with Photoshop and an Intuos4 with a flex nib; not so well with an Intuos2. You can try it yourself if you want: Download. Just like the actual pen, the harder you press down on the surface, the more it leaks. Only, this one doesn't burn through hundred of cartridges... or leak in my pocket.