Don't talk about NFS please. Little bit realistic were the first and the fifth issues, other are hopeless and had almost nothing common with car behaviour.
You are just kidding, aren't you? Uncontrollable slides with real toy car like 370Z, racing slicks more friendly than road tyres, road cars equiped with wrong tyres at purchase, all this you call "most realistic"? What kind of faerytale you bring me next time? I feel that square tyres would be perfect next candidate for "most realistic aspect" too. They would be surely great for making game yet more difficult than reality is.