Thanks, golunvolo and Carl, for the comments.
So far, I am loving the Df. It reminds me very much of shooting my Nikon F3's many years ago. For the first time in a long time, I find myself hardly ever chimping with the Df. I trust the camera to deliver the shot properly exposed, etc. Almost all of the major functions of the camera can be locked in place so there are no surprises when I raise the camera to my eye. It really makes for a great shooting experience as compared to my m4/3 system. Of course, one of the biggest trade-offs between the two systems is size. So it is taking me a bit to get used to the much bigger Nikon camera and lenses, but the Df is fairly lightweight for its size. Overall, I am very glad to have made the switch back to the Nikon system.