I prefer the teens to be exact. 1910-1920-ish. Back then a man could have a handsome waxed moustache and be the coolest cat in town. Also, the Model T cars came in one color, evil assault weapon black, my favorite color.
The style in the 70's was grotesque color combinations and plastic. Not a good era for style.
Watergate, Viet Nam, Presidential resignation, The rise of OPEC and gas prices, Patty Hurst, Bank Robberies, Bombings, Hyperinflation, Jimmy Carter, Iran, Hostages, GRID....turned to AIDS, Elvis dead, John Wayne dead, Bing Crosby dead....yeah, a real blast.
50's were grease, 60's were grass, 70's were gross.
I like the cars of the 30s-50s and some into the 60s. Music was better in the 20s-50s. Style was better/more simple. The change over from everything going from black and white to color would have really been weird though.