I love the 1950s aesthetic. Walking through a store and seeing an advertisement for star cals for example would be the coolest thing to me. Advertising in particular from the 50s is nostalgic to me even never having experienced it.
Similarly the roaring 20s give me the same second hand nostalgia feeling. I love the architecture and flashy lights, monster movies. This snapshot of Wajo from his 1924 scrapbook is the best I can show this.
Another that really interests me is Worlds Fairs. Chicago 1893 in particular, but also New York 1939/1964. For this example I'm showing my 1939 centennial paper logo with the original envelope given out at the 1939 new York world fair by Oppenheim Collins. A womens clothier.

