Whoa nelly that last one is fugly! Kind of Clrak Griswald family truxter funny ugly. But its still cool.

As for rules? Rules for cool? BAH there are none its just whatever you might think thats badass. I suppose we could attach some basic criteria such as impact from the first time you saw said car ( Batmobile has a strong argument here for many ) or perhaps the General Lee is also one of the all time badass cars from TV although there was a movie or two the TV General was badasssssssss.

And Im no fan of Dodge personally