Oddly enough, I played around with leaving the Texture and Dual Brush settings on and it worked remarkably well in the picture I was working on! (Granted, that picture does not have nearly so much of a close up on the hair as our dear Don here…but still…)
Thanks for taking the time out to share what your brush settings were! I’m going to have fun playing with them. ^_^

Oh yeah, those are off. XD Actually, my exact settings are:
Brush Tip Shape -> Angle: 135°, Spacing: 1%
Shape Dynamics -> Size Jitter: 0%, Control: Pen Pressure; Minimum Diameter: 50%
Other Dynamics -> Opacity Jitter: 0%, Control: Pen Pressure; Flow Jitter: 0%, Control: Pen Pressure
Airbrush -> (checked)

Everything else is unchecked/turned off/set to 0%. I also use a second brush that’s almost the same, except that the Minimum Diameter is set to 1%, which is good for finer strands. (Single hairs still just get the plain old round brush treatment.)

Since you mentioned hair, that reminds me: I also found a great brush to use for that while I was working on this. If you use Photoshop, you can modify the “Rough Dry Brush” (the one that looks like a cluster of dots, in the Wet Media Brushes presets) to work really well for hair. You just need to play around with the settings in the Brushes palette so that the width and opacity change with pen pressure. (Setting the Minimum Diameter to around 25-50% seems to help.)