How long are you planning on keeping it?
One day you'll have to give it up, one day, and move on with another iPhone.
Maybe you should try white, the white is nice.
I plan on keeping it until it dies. Whenever that may be.
I just gave away my HTC Touch Pro this year for someone to be able to keep their Sprint SERO (employee) plan. That phone was from May 2009. I also gave up my iPhone 3GS that my sister gave me for Christmas 2011 so a friend could have a phone. That one was black and is still serving.
So, not overly worried about that. I'll upgrade at some point. May not be an iPhone, may be. I like Apple. I own a lot of PowerPC Macs, but I'm not an overly attached fanboy so whatever I may like. The iPhone 5 is what I waited for (didn't want the 4/4S). Now that everything seems to be oriented towards gray and not black…not so much interest in the iPhone for me.
I will admit that my wife's white iPhone 5 is very attractive, but the color is just not my style.
Don't even get me started on iOS 7 which I, unfortunately, have been forced to use because I had to replace my iPhone 5 because of battery issues.