I've had white, red, silver, blue, yellow and green cars in the past.
Nothing looks as good as the VW DBP on a GTI when clean. Sets of the red lines beautifully and is quite discrete, not as shouty as red or white.
If you can't be bothered looking after it then don't choose Pearl Black.
My third black GTI in a row so maybe I am biased.
Very personal choice as always.