I guess for everybody it is different. When the front of the car has substancially more grip than the rear, you're going to get oversteer. I don't think this is a problem at all in a FWD, because correcting oversteer involves no more than a little throttle and pointing the driving wheels in the direction you want to go, the back will follow. I prefer snows up front, none in back, because I enjoy the potential oversteer thats on tap. However, for safety for drivers that may be less able to cope with oversteer, 4 tires would be safer.
