Dunno about you boys, but the fun for me is getting normal road cars to go fast.
I just love it when I go to my mates house with my memory card, and I challenge them in my road cars to there race 1s and beat them.
My favourite road car at the moment which im still setting up and fine tuning is the M3 CSL.
Another fave is the very old Misti Lancer GXI or whatever it is, its old skool rwd, complete with a good old slap of turbo lag, so gear ratios and driving technique is imperitive but thats all the fun.