Someone acknowledging that there are people buying iOS devices for their looks (probably more like hey, look at me, I’ve got a brand new iPhone) doesn’t equate to that person himself buying devices for decoration.
I feel like I should point out though:
iPhone
3G - new design
3GS - white
4 - new design
4S - white (not initially available for 4, iirc)
5 - new design
5S - gold
6 - new design
6S - rose gold
7 - jet black
X - new design
XS - gold
Personally, I always go for boring slate/space gray/(matte) black.