Thanks again to everybody.
Akarin...I import my DNG files into Aperture, and export to the SilverEfex Pro 2 plug-in. My favorite starting point is the Ilford HP5 preset...it has a great tonal curve. I add or subtract grain to suit the image, and dodge and burn like I would attempt in a darkroom. It really depends upon the image...some look too flat, so I use a contrastier tonal curve like TMax (usually for faces/skin tones if they're too muddled and gray). Again, it's just a starting point for tones...I change/add grain, dodge/burn, etc. One thing I don't often do is sharpen, or use structure. A small amount sometimes shows details, but too much sharpness is hyper-real and a dead giveaway for digital capture, and I prefer my images filmic at the expense of sharpness or grain-free.
JSU...thanks for the info. Every other camera I've used allows a purely raw workflow but can project a preset to the rear review screen. The M9 is the only one I've used that won't allow that, requiring DNG and JPG capture simultaneously. It's not a huge deal, I'd hate to slow down the camera any more than it is...but a b&w review would be nice when I'm shooting in the "zone." 🙂