Most all of them were attractive compared to today's cookie cutter designs. Back then you were able to name the car by it's looks from 500' away. Now you have to get close & read the name on the trunk.

But, I have to say the '60 Lincoln Continental was one of the ugliest cars designed. I remember building an AMT 1/24th '60 Continental kit back in the day. I thought it was ugly then.

Fins....90% of those cars had fins. Helped them go straight we assumed back then. T-Birds (Ford, not Pontiac) were probably the most beautiful in my view.