Not the worlds biggest yas marina fan, find it a little bit pastel and "cartoony". Obviously I most like the sakhir orange, its one of those colours people dont think they like but when you see it is a stunner. For me it was sakhir or tanzanite. Yellow is very nice in the metal also. The other colours dont really show off the lines IMHO, and dont highlight "da carbon" bits, should you so choose,...and you should. Its a yob car and needs a yob colour. But to be honest no matter what you go for your onto a winner, very good looking and aggressive car. If I was going to buy new and individual I would order purple silk cuz I is a chav.
Here are some photos I have accumulated of M4's. You can see how the colours change in different lights, Yaz, Sakhir and Austin are best for this effect.