There are some cars that are very good looking, but they aren't as exciting to see. Take the Lamborghini Murcielago for example: it's a very sexy car, but if you're a car enthusiast, you probably hear about it all the time. You probably see it a lot too, whether it's on the road or online. It takes some of the mystique away and becomes like an overplayed song on the radio.
However, a Ferrari F50 is something you don't see or hear about often, even in the media. Seeing one in person really feels like a special occasion.
Or take a very odd shape, such as the Lamborghini Espada. That car is not what the average person would call "beautiful," but it's rare, and you hardly ever see one even in the media. It just feels so much more special to see one.
This video talks about (and shows) many examples of this.