A little biased here, but, I have to go with my first car, the Boss 429 Mustang. I posted a pic earlier in this thread. IMO, the 1969 Boss 429 is the best looking Mustang ever. Here is a quote from the attached article/link.
"Killer looks, ground-pounding engine, limited production, and high dollar resale, the 1969 Boss 429 is one of the best looking muscle cars on the planet"
http://gearheads.org/why-is-the-1969...r-of-all-time/