One of the biggest practical ergonomic improvements for me when I moved from my old D50 to the D90 and then the D7000, was the increased size and accuracy of the LCD. The little LCD on my old D50 is too small, and always looks underexposed. It was worse than useless, because it made my photos look terrible compared to how they looked on my computer. The LCDs on my newer Nikons are big enough to see if a photo is sharp, and give me some idea if my exposure is right. That's pretty much all I need.
That said, when I look at the LCD in the field, I zoom a couple clicks, and am basically just checking focus/sharpness. I also am sometimes trying to see significant differences in white balance, especially indoors in bad lighting. But to be honest, I wouldn't trust the LCD to evaluate color accuracy, it's just too small, and my eyes aren't that good. If my LCD had a "slight" yellow shift, I'm not sure I could tell.