Every decade seemingly has its own personal fad. Most recently (and seemingly entering its second decade in the ’20s) it was the combover. Oops, I mean crossover, heh. Before that it was the SUV and before that it was the minivan. But the gotta have it vehicle type in the 1970s was most definitely the personal luxury car.
To wit: A two door coupe or two door hardtop with a long hood, short deck, gigantic doors, and likely sporting a stand-up hood ornament, opera windows, opera lamps, a landau top and wire wheel covers.
This type of very American Motor Vehicle got started in the late 50s with the four-seat 1958 to 1960 Ford Thunderbird. It was followed in roughly chronological order by the 1961 Oldsmobile Starfire, 1962 Pontiac Grand Prix, pricier and more exclusive 1963 Buick Riviera, 1966 Oldsmobile Toronado (with front-wheel drive, wowie zowie!), the 1967 Cadillac Eldorado and the 1969 Lincoln Continental Mark III.