My idea of a good feature car is a vehicle which is well built/maintaned, it should be very thoroughly made. Either if it is restored to original shape, or if it is a balls out track day car or rally/race car.
Also, a track day car which doubles as a concorus car may be the ultimate mix, if it features good looks AND great power/handling.
To me, a car with no interior but seats, cage, steering wheel and a couple of gauges is not too exiting, but then again I'm all for good looks and nice interior details.