I love my Space Gray! I like not seeing my screen when it's turned off. I wished Apple would have introduced a Gold/Black combo as well, then I would have considered that one.
White and Silver, went perfect with IOS7. It was the first time I bought a white iPhone, and it was mainly for the fact of all the whites that came with IOS7 it just seemed to go perfect with it.
I plan on getting a Space Grey one,although Gold is nice too.
Personally anything thats heavy on the use of the color Silver to me looks unfinished, like someone forgot to add a coat of paint or something