The biggest adjustment for me has been adaptation to the more narrow depth of field and need for higher shutter speeds (relative to 35mm) to achieve critical sharpness due to the higher resolution. That is a double whammy because as you stop down to gain depth of field you loose shutter speed. Add in the generally poorer high ISO performance of digital MF and you have a challenge. I like it though, because it forces me to pay more attention to what I and doing.
Same for me. I was used to the Nikon base ISO 200. Monopod is now my third leg :ROTFL: I thought I was going to miss the focal plane shutter, but thanks I now need to use smaller apertures I've never needed it (so far).
Something that I don't hear often as a MFD plus is the larger FOV. I'm really happy to be able to shoot a group of people with a 50mm (with no distorted heads or legs, thanks to Phocus lens corrections also) instead of a 31mm that I would need to use in 35mm terms, that adds a lot of flexibility in small spaces.
Loving the extreme shallow DOF. A friend of mine uses a Canon 5d Mark II + 85 1.2... I found that combo comparable to my H4D-40 + 100 2.2, but I've found the Canon 1.2 wide open is kind of soft at the focus plane. I'm really impressed with MFD wide open (the HC 100 at 2.2) the part that is focus is really sharp and the out of focus trasition is really pleasing to the eye...
Talking about retouching, I love the resolution I have now. It's not the same trying to retouch a group of people where each face is 300 * 300 pixels instead a face made of 800 * 800 pixels.
I haven't hear this point on favour of MFD often: When you retouch or make a comp (I'm also a graphic designer, and I make a lot of comps often), more resolution IS ALWAYS BETTER. Try to insolate a person from a 10 MP image, and try to do it from a 40 MP image, the 40 MP mask always look better... it's a fact for retouchers.
Also, the extra resolution and sharpness has been a blessing and a curse so far... blessing when working with models with nice skin, but when you shoot a portrait of a bride with no so good skin genes it take a little more time than usual (but not that much).