My First Choice 1994
A lot of people fail to realize just how huge 1994 was to NASCAR reaching another level. The combination of Jeff Gordon winning his first race, the baseball strike and NASCAR racing at IMS created the perfect storm for the the insane boom that occurred in the late 90s. The baseball strike basically made NASCAR the new boys of summer for the next decade. I'd love for a more detailed explanation on how the baseball strike opened the door for Corporate America/Mid-town Manhattan to embrace NASCAR. A conversation with a close associate of Roger Penke opened my eyes to what the strike did for NASCAR. 1994 also saw the end of the tire war which dated back to the late 80's. Ernie Irvan's crash at Michigan was basically the last straw. The death of Aryton Senna sent shock waves around the world of auto racing that year. 1994 also happened to be Earnhardt's final championship....
My Second Choice Would be 2001
It's without a doubt the most impactful season in this sport's history in terms of the sports ultimate identity imo. Dale Earnhardt's death is obviously, and sadly, what most people remember. However, it's the TV deal that was signed which completely altered the direction of this sport. The previous 53 years of NASCAR prior led up to a seismic changes that occurred in 2001. The money, the sponsors, the schedule changes, the track building, the attendance boom, increase in driver fatalities in the late 90's etc basically climaxed at the beginning of the millennium. You also have Dodge's return to NASCAR, Elliott breaking his winless drought, restrictor plates at NHIS, 9/11, Gordon's 4th and final title and commitment to safety improvements.