Love watching my alternative PSN Bobs driving beyond their abilities against my level 28+ guys. All my alternative guys are level zero, so are generally found in the kitty litter, or waiting for a large enough gap to rejoin the track.
The best event of that is La Sarthe, towards the end of the second lap they're all completely zombified and start drifting LMP cars into gravel traps, or each other!
(Not so much fun when your best driver gets stuck with the Panoz though!)
I also have my own music set within the game and have the music level higher than the sfx, so don't really get bored with engine notes etc.