Note that this is a highly opinionated and subjective post, YMMV
When people talk about a great driver or moment, are they reminiscing about something he said or did on the track?
I myself think of moments like Alan Kulwicki at Atlanta in '92, Craven and Kurt Busch battling for the checkered flag at Darlington.
Even with the famous 1979 Daytona 500, I'm thinking of Donnie and Cale overcoming early problems and making up laps during the race only to take each other out trying to win it, with Petty ending a 43-race winless streak; that was the passion, in my opinion. That, along with the smells of racing gas and tires, and the noise that dominated the senses, etc., was the stuff that got me out of bed the next morning with instant thoughts about the next race, and I lived all week just waiting.
I guess Bobby and Cale showed more personality with the post-race fight, and to be honest, that is what people still talk about the most. But I could have lived with or without the fight between Bobby and Cale; that's not why I follow racing or made it my dream as a kid. Bobby and Cale were both larger than life because of the way they drove; the fight was a sideshow, to put it kindly.
Tim Richmond is another interesting case imo. Some called him Hollywood, and he may have had the wildest personality of all. But it was his incredible performance during the last 2/3rds of the 1986 season that inspired me. The Richmond/Hyde combo was terrible for the first 10 races, and it looked like a bust. Then they figured it out, and they could not have been any more brilliant imo. It was a great racing story that a contrived Cole Trickle could never accuratly represent.