Anything that has that worn piece of soap looks, everything smooth and rounded without real shape, like
this one for example.
Silly big grille fashion is really ugly too, imo.
When parked car looks like it would roar and accelerate away anytime, then it is nice looking, difference can be really subtle, Countach is beast, Diablo is ladies purse.
I have wondered many times why many modern cars do look so vague, but I can only make conclusion that it is because those are nowdays unisex models, there can't be such elements that turns away certain customers, or so car makers do think.
Modern Mustang is refreshing exception.