Actually grey is the most versatile automotive colour there is. There is almost never a grey-grey. You get blue-greys, green-greys, red-greys and every shade in between. The best grey I've seen for big cars is the Porsche brown-grey and for small cars the Renault turquois-grey. The next time you look at a grey, pick out the secondary colour. Then you'll understand why you like a particular grey and not another.
In M'sia, black seems to be an increasingly popular colour. IMO black only suits big cars, ie limos, not medium and small cars with short wheelbases and no overhangs. But you even see it on tiny Myvis and Getzs, which looks odd rather than beautiful. Sorry to those with SB E90s, but I don't think even the E90 is big enough to carry off a black with style. Black is boring because there can be no secondary colour in a black. Flame me! Flame me!