All seventeen RM cars for me, but just one of each...
Individually numbered 1 through 17, in the order I bought and RM'd them.
(Although, I intentionally made the TVR the sixth in line for the obvious reason...)
I try and stick to color groupings, and will stick with a manufacturer-specific color if it appeals to me.
Both Vettes are both in shades of blue.
Both Camaros will be in shades of teal/aqua.
The Cappuccino is in Iris Red Pearl.
The Challenger is in a gold-ish color from either Dodge or Chrysler, but I don't remember the name.
All Hondas/Acuras are in a Honda-specific red that I also can't remember the name of.
(Notice that the Acura gets transformed to a Honda when you RM it?)
The TVR is in a shade of grey, but I think it needs an update to something like Chameleon Orange or Reflex Spice.