This is going to sound like a dumb reason, but one of the reasons why I stuck with the cMBP was for the silver bezel look of the AG. Now, I didn't base all of my decision on that, but it definitely was a factor.
My friend recently got a rMBP and I have to say as much I like it, I don't have any buyers remorse on my cMBP, and I think it's because of the AG silver bezel look. I just wanted to see something different from all the other macbook pros i've seen in college, which mainly have been the glossy glass look. I know either way, I'm getting good performance in whichever system I choose, but now I'm narrowing it down by the nit-picky stuff like looks of the system.