First of all you have to like cars, at least a little bit. But more importantly is knowing the drivers, otherwise you are just watching bright billboards doing circles. For instance last night as they came to the line it was not the 26 car racing the 2 car, it was Jamie McMurray, who won his second race ever and gave one of the best winners circle interviews ever, versus Kyle Busch, the talented yet whiney nothing is ever my fault brat. Once you know the drivers you will see who brought the right car and who hit the set up right, who missed the set up, who is starting the race good and satys good, who starts off bad but improves their car and has a good finish, who may not have a good car but will steal a win on gas mileage. As I have told my wife, it can be like a soap opera.
One way to look at it is say you like baseball. You would be more interested in watching a game where you know the teams as opposed to watching the Ventura County Cardinals versus the Santa Barbara County Seagulls.
BTW my wife HATES Tony Stewart.