I and many others I play with love the
BMW E21 mod, great fun to drive.
I have also been really really enjoying the
MMG F1 2007 mod from rFcentral, these MMG guys have really really given Geoff Crammond a very very good run for his money!!! I actually think this F1 mod kicks the **** out of any other F1 game/mod I have tried so far on any game.
Also the
MMG trackpack from Round 1 to Round 5 is really really fun, and these seem to be the most played tracks on the rFactor lobby for the MMG F1 2007 mod. But I have not seen these on rFcentral though so I have no clue as to weather these have been officially released or not.
The
RallyCross Group B cars are also very very fun if you just want to have a less intense racing experience.
The tracks for the RallyCross Group B cars can be found
here.
hope this has been some help to you, and look forward to seeing you on rF asap!!!