One thing I can't do is transpose covers into a style they don't belong in, like Activision into Atari Silver. Drives me crazy.
They might not be uniform, but when you get multiples of the same company's boxes next to each other, Atari titles look pretty awesome.
I get what you're saying, but my entire 2600 collection is the same style except for the 9 I listed. Out of those 9, only two of those are matching styles. So for me, they don't look that good next to each other and it makes me feel the same way you do.
For what it's worth, I really only care about the spine. The front can by any style at all. I know that probably doesn't help since you would end up with an Activision front with an Atari silver spine which would probably drive you even more crazy. But I thought I would mention it.
For the record, just because the spine doesn't match, doesn't mean the covers aren't really well done. I appreicate the people who made the covers and I would rather have a non-matching cover, then no cover at all. One of these days I'm going to try to get my self familiar with Photoshop. Maybe I can make my own some day...