I am a user of the MM for some time now, and have been using Photoshop from conversion of DNG and staying with Photoshop to finish the images I make. I don't begin to profess that my way is even the most efficient. My son has been after me to go to Lightroom and I likely will here in the near future.
I agree that the files need none to little processing. I think of it as I did shooting film where I'd try to nail my exposure and do as little processing as I could to get a satisfactory result.
I realize there are "shoots" where I import several files that are similar and would benefit from batch processing but I've never taken time to orient myself that way. I process each file similarly, however when I apply certain settings, I have those in mind to replicate from one file to the next quickly.
In processing the DNG, I will often apply auto and get a sense of how I feel about it, but almost always, dialing exposure back to "flat". Then in Photoshop, I use Curves, and treat the curve according to "zones" as I'd have done in a darkroom. I never formally did zone system, but I am aware of the thinking and practice and in my dilettante way, try to adhere because it makes sense to me. The MM really makes that way of seeing and shooting come alive and that is in large part my attraction to the camera.
David
Sharing this because it is an early image I made with my MM (Zeiss 50mm f 1.5 Sonnar) and because I want to pay tribute to the best dog ever. My kids and I just put him to rest following a short but fierce battle with a tumor on the larynx. RIP Frankie boy.