4, 4s and two iPhone 5's (5, not 5s).I think for me it goes back to iPhone 4 maybe 5 where these sold in huge volume and set the standard for iPhone colours.
I know there was a white one, but I think the black looked particularly good!



The white iPhone 5 is my wife's old phone, purchased Summer 2013. The black one is mine, purchased September 2012 (pre-ordered, launch day delivered).
Right now the two 5's are being used infrequently as speakers for my MacPro (through Airfoil).