for me..
wood grain vinyl siding. recently reintroduced with the PT Cruiser.
short lived fad for my time"? hmm. gonna have to say the square headlights on hot rods/street rods.....
oh yeah early 90s-mid 90s, due to the late Boyd Coddingtons Smoothster, the smooth everything down cept hte body lines and paint it all one color! fad.
I still see the jacked up high rear low front with huge tire fad here, not as many as used to, but it happens with the trucks and muscle cars....
another shortlived fad; window shades that you have to pull down and stick velcro on.
Garfield hanging on the window
full width bench seats in front, I don't think today there exist any sedan or coupe with such an option!
as recently as 2004, hyundai offered cassette players by the way.
spinning hubcaps. thank god that didnt last long..but i STILL see spinning things in rims dammit.
the lace, cobweb, panel fading, special effect paints, is still popular with the Lowrider crowd out here.
cartoonified bugs. (there's one that's had a foot and half sectioned length, section used to be the middle! extrememly SHORT wheelbase lol)
the Pro Street with back half and tube chassis and supposedly street able engines....
i think i;'ve only seen a backhalfed tube chassis FWD car with a rear axle that was a replica of the rear differential, but is not operable...stupid no?
lamp black out covers. used ot be there ws a kit for every model possible, but they no longer are popular.....some still use them as it was a quick way to aero the front (see multiple examples on this here forum lol)
bolt on chin spoilers in black, kind of like the Gurney racers.