Richard Burns Rally is a favourite...
I have been really hooked by GT racing with GTR and GTR 2. Done some Live for speed, rFactor and GT Legends on the side of that. iRacing I have tried a bit but it´s to expensive for me.
I am using a Nixim Racecraft GT cockpit, I have CST pedals. Except for that Fanatec Turbo S with club sport pedals currently. Have owned G25, GT 3 RS and others so you can say I am bitten by it.
I am laying low at the moment with some arcade racers like DIRT 2 and Forza 3. Though Forza 3 qualify as a semi sim.
GT 5 I will get of course but I don´t have that high hopes for that one based on what I have seen and driven so far. I strongly disagree with GT series having good car physics!