I have switched to a complete G2 system about 2 years ago. Gave up long teles and macro, so what ...
Last night I was looking for pics of a certain subject area and I decided to look through 6 albums of 100 8 x 12 inch enlargements each taken during the last ten years. The majority was shot using a F100 and Nikkor lenses. Seeing my "old Nikon pics" again felt very uneasy: Some were as good a shot/composition as ever, some had won prizes and I was still proud of their capture. BUT, even the prized ones were not up to my current results and and I was floored and disappointed. Then I came to my recent G2 enlargements and they made me happy again: the dynamic range, color clarity, detail clarity, sharpness, just aliveness was what I have become to expect now. And my Nikon pics in comparison reminded me a bit of the step up from of my brownie boxes of 50 years ago. Just not good enough. It was a true discovery of one right decision I had made.
Yes, many former G users have or could never master(ed) the system and have sold out. But for best rendition photographically, it is worth all the learning pains with a G2. Otherwise, I could have stayed not-knowing, Nikkor shooting and been happy. Or maybe not.