I would say your steering is probably pretty normal. The camber of the road (the slope away from the center to the edge) will always tend to cause the car to steer towards the gutter and therefore need a small amount of correction to continually 'climb' back towards the center. Try driving on the left-hand lane of a one-way street where the camber SHOULD mean you have to steer slightly right to stay straight. If you find you still need to turn slightly left from the left-hand lane (assuming the road surface has a high point in the center of course) then your steering is off. Otherwise it's pretty much normal and the degree of steering correction will then depend on the speed, the angle of the camber and the weight of the vehicle.