Love my D4 but
I wish it had two card slots of the same type card. Either XQD or CF but two of the same instead of different types.
I also wish it was even higher resolution, maybe 24 megapixels. I have a D800 and I'm blown away by the things I can do with a 36 megapixel image. Unfortunately the D800 has a FPS that is just a bit too slow to use it as my primary avaition camera. While the 16 megapixel of the D4 is better than the 12 of my D3S or D300, it still could be higher.
Clifford W Martin