I went to the Autorama in Detroit years ago, and have to say that the more fond of a model/make I was, the more I disliked the changes to it.
For instance changes made to a first year T-Bird or split window Vette really offended to me.
However massive changes to a early 1960's Imperial were almost charming, endearing even.
2011 Autorama
http://forums.pelicanparts.com/off-topic-discussions/391522-random-transportation-pictures-435.html
Once in a while I see some fairly cut-throat changes to a Porsche and like it, Rauh Welt for instance comes to mind. And there is this blue De Tomaso Mangusta race car with wheel flares that just delights me like a kid with a new Hot Wheels car.
http://wallpaper.imcphoto.net/vehicle-wallpapers/beautiful-italian-cars/de-tomaso/de-tomaso-mangusta-racing.jpg
It's a fine series of lines between enhancement, customization and desecration.
And it's all subjective.