I don't think you have to be a fan of the theme to enjoy any game. I mean The Shadow and Congo movie both sucked in my opinion but I have no plans of selling either anytime soon
I think Indy 500 has some great call outs, music, dots, modes, shots, toys etc... The spinning Indy car on the top right sort of doubles as a shaker motor and really gets going if you can make the right ramp 4-5x in a row as it just continues spinning around. I'm not a racing fan and still appreciate the game even after 2.5 years after ownership. It's also a game you don't see often in people's line ups or at least up where I am.