What iPhone 4 colour is more popular?

I don't want to be a chav

Female go for white for clean and classy and smooth look
male go for black for deep rich intense look

I'm guessing white. Everybody loves the white ones. I personally prefer black, though. They aren't as easy to get dirty.

I went for white because it does not show finger marks easily and it is more easier to find.

I believe white to be the most popular, I have a white 4S. But you shouldn't base your choice from answers on here, you'll be the one using it & carrying it around with you so it's completely upto you… Plus if don't really like either but still want an iPhone then have a look on eBay at cases/stickers that give your phone a complete new look.
Hope the helps.