Something about it is just odd in person especially from the side lol. I actually like it but I can see why many don't.

Most beautiful; Aston Martin Valkyrie
Ugliest; It has to be the Devel Sixteen. A hideous excuse of a car.

Just looked up the Devel- kind of looks like a cross between a Veneno and a Huayra BC, only an error occurred during the fusion process.

To me personally

Beautiful:
-LC500 (not a supercar, but a grand tourer)
-Murcielago SV
-997 GT2 RS

Ugly:
-Aston Martin DB11. I can't stand the front half of the car. Aston Martin has lost their touch imo
-Huracans (with the exception of the Performante)
-Centenario (Although rare and expensive, I hate it)

Updated list for 2017.

Most beautiful:

Aston Martin DBS
Aston Martin Vantage
Lotus Evora GT430
Porsche 997.3 GT3 RS

Ugliest:

Ferrari LaFerrari/Aperta
Ford GT (the new one, obviously)

I have a new ugliest supercar: Bugatti EB110

I was going to yell at some of the older posters here for saying the Egoista is the ugliest since I remember it looking really good so I looked it up again and JESUS is it not as good as I remember. The huge gaudy bright orange wheels, the tiny spike shaped doors (WTF), the random lines and holes near the ends, but most importantly the platforms at the bottom of the front and nonsensical areas of exposed carbon fiber around it just ruin the almost non existent flow.

EDIT: And also the fact it only has one seat. And the fact the roof goes up instead of in. Jesus the layers of suck here.

Most beautiful:
Most Ugly: