"Personally, I think everything looks fine, though, I'll admit, not spectacular. My secret is to not do any side by side comparisons!"
I recently temporarily used a 3rd gen I-Pad (admittedly much more expensive) and going back to the Nexus left me wanting a more vibrant display on that device. I am surprised no one (including Google) has figured out an app that would allow some adjustment/enhancement of the display.
But I agree the display is ok, as long as you don't compare it to the screens of more expensive devices.