If we were all the same there would just be one colour available.
We all have our favourites be it the colour or the practically. My current choice was dictated by interior colour options.
I think gray is the dullest "colour", especially on an already not very extravagant car like the Jazz. We would have chosen red if the red paint of the Jazz had been as beautiful (or at least almost as beautiful) as the red of our previous car, the Yaris:HEAR! HEAR! Especially the 'putty grey' so beloved of V.A.G.
But alas, it didn't come close to that beautiful red, so we wanted something different. So we chose Premium Sunlight White Pearl.
I’ve always wanted a yellow car, but it’s not available on the Jazz.
I did come close to buying a civic (mark 9?) that was available in a yellow/gold colour for the editions near launch before it was dropped later.