I love the non-metallic colours that are coming out right now. My GTI is the Cornflower Blue and I love the colour to bits.Flat or matte finish is just another style, just like pastel colours of the 1950s were a style that came and went. Personally ... dislike. Looks like someone painted the vehicle with Tremclad. I've heard they're harder to keep clean, because the normal waxes and polishes can't be used. (well, you can, but you'll end up with a blotchy kinda-shiny-in-spots finish)
The new shades coming out of BMW/AUDI/MB with light hints of blue/green/grey and the colour combinations are gorgeous. Much better than the majority of white/black/silver/grey which apparently makes up 30% of new car sales.
I was literally listening to this earlier this week, and highly recommend.