I'm a huge motorsport fan, so just wondering what are your favourites?
As I'm a pretty hardcore motorsports fan and a fairly hardcore gamer, I tend to go for the simulation racing games rather than the arcade like games.
I'm a big fan of the Grand Prix series from Geoff Crammond for the PC. I know there hasn't been a game since 2001, but mods of the new drivers/teams/circuits are uploaded and updated very regularly. I don't actually own Grand Prix 4 but have played demos and absolutely love it. It's not currently on sale because it was released 7 years ago but I'm hunting around for a cheap copy and will hopefully get one soon.
A decent video showing the game with 2007 updated cars/teams/circuits: http://uk.youtube.com/watch?v=rG2YzbnvMJI
Not bad for a 6 year old game.
Also I'm considering buying another PC game called 'rfactor'. It's not an officially licenced racing game, but it has loads of different car series like Formula One, Touring Cars, karting and many more. Again you can get Mods to download.
Amazing graphics: http://uk.youtube.com/watch?v=Nr5zu4bE3jw