For what it's worth, some of the differences people are seeing is b/c they're going from one screen type, pixel layout, etc., to a completely different one. And if you haven't used the new device extensively, you're going to be VERY used to the older style (such as the LCD on the Droid X) since you look at it every single day, and probably have been for a long time. Then you throw into the mix this pentile pixel layout that Moto has been using (both RGBW on the D3, DX2, and Bionic, and RGBG on the Razr/Maxx), and it can be quite a shocker. LCD tends to be more accurate in colors, but toned down a bit. Therefore when you go from looking at that every day, to looking at something that has to cope with an extra green pixel (RGBG) or white pixel (RGBW), it can be a tough adjustment initially. RGBW on the Bionic, etc., makes the screen very bright and by far the best to use outside thanks to that extra white pixel. But it also makes things look more pixelated, at times. RGBG tends to have a tint to it, and the whites aren't as white as RGBW (obviously) or LCD/Super-LCD. It also tends to look "warmer" with the colors "popping" more. With Super AMOLED, blacks tend to be true black as well, instead of that black with a glow that LCD and RGBW has.
I didn't elaborate real well on that, but look at this thread (not to tout my own post!):
http://www.droidforums.net/forum/dr...ezound-razr-bionic-side-side-pics-videos.html . The Rezound is going to be the most similar to the DX, but with a much higher resolution. In these pics you can really see the differences in the brightness of RGBW, the warmth/pop of RGBG, and the accuracy of SLCD. As has been stated, each has their benefits and drawbacks, but I can understand someone having a negative reaction moving from the more accurate LCD to something like Super AMOLED with RGBG pentile...
Oh also, the Gnex basically has the same screen as the Maxx/Razr, it's just 720p instead of qHD. I think the brightness issues on the Gnex are more related to the fact that the auto-brightness in that phone just has a tendency to think too dimly, b/c once it's turned up, it's fine.
And the bottom line, again as has been stated, is it's all extremely subjective. As soon as I get on here and tell you Super Amoled with RGBG has a "tint", someone will come here saying "you're crazy man, I see NO tint on mine!"