I had a white 3G, and now a white 3GS, both times due to the black being out of stock. I pre-ordered a black, but UPS "lost" it. I guess having a black one is not in the cards for me.
I find the rounded white with the chrome border very girly, but I don't care because it goes in a case anyway. I actually like the look of the white button cutouts when in a black case.
Neither looks as good as the original iPhone's aluminum.
White iPods had hard edges and no border, so they seemed less feminine to me.