I wave at cars that are clearly deserving, Challenger HC/SRTs, even a nice Vette on occasion, as long as they're not dripping D-bag cosmetic mods. Anybody that has a car that is showing their pride in the automobile. Me and a Lambo exchanged pleasantries the other day...
Then there's a Challenger RT that I run into every now and then...
The front of this thing is literally falling off and held on with some unbelievable collection of cargo straps and wire. This guy might as well be dead to me...