I have 4 Lightnings, 3 Mater's, the different colored Ramones, 2 Flos, 2 Fillmores, most of the Piston Cup racers (my No Stall got broken) 3 Chick Hicks (one is the Dinoco variant), 2 Macks (one is where there is a second platform), and many more.
Before you joined, at one point, I was themed after Boost. He's my favorite of the asshole neon cars.
When I play (yes I still play with them) with my cars, Doc is friends with Lightning and hangs out with him.