I think nothing looks nicer than a clean black car, I've had several and always regretted it as actually keeping them clean was nigh on impossible! My current Volvo is classed as "platinum" but it's more of a grey with a brown tint and it's actually quite good at disguising the muck.
Nowadays I tend to buy ex-demonstrators so my colour choices are restricted but looking through some of the new colours available I don't think there's any that I'd actually like! Personally I think a very dark metallic red looks nice.
My present new car is black. When buying I was offered a diamond coating. My past experience on cars and caravans has been very good. But I lack confidence in the national companies doing the job properly. The Volvo I had I needed to get them to redo it.
So I had the work done by a local person who not only coated the car, windows, and seats. But, also machine polished the bodywork. Something you may have thought would not have been necessary on a new car. The improvement was stunning, And still looks good 6 months on. It is easy to keep clean though at only 2000 miles, gets little use. £500 well spent inho.
The picture shows the car that has not been washed for about 3 weeks.
NB those marks below the head and fog lights are only reflections!
John