I voted for Space Grey, but really wish there was a slate black option. I just really like how the screen looks when not on when on a darker device (makes the screen appear bigger and blends in) where on a lighter colored device you get that stark contrast between the screen and the edges.
When I heard about the gold model I figured mostly women would be getting it or folks (male or female) with darker/olive complexions. However, after reading many of the other posts it seems like a lot of people like the gold and say it isn't as "brassy" in person.
I guess it all is a moot point if you use a case...