As a collector of worldwide stamps, I always find it interesting how collectors perceive stamps of our own countries, and then that of other countries.
Quote:
I love the art style, which can best be described as "Chinese propaganda poster"...
In principle, it's actually not too much different from several US stamps of the same era (i.e., the Bicentennial issues); consider the simple quotations of the First Continental Congress Issue, the Contributors to the Cause, the famous (in the US/Canada) paintings of the Battle Anniversary Issues...
As you noted, there is a significant art style difference. Ironically, the perception of propaganda poster goes both ways! I find that rather amusing. It's not always just an issue of geopolitics, but I would say cultural background differences contribute significantly to perception. I know I tend to lump things into the term "propaganda" when I am unfamiliar with the event/person/concept being commemorated and the other government has different ideals. But sometimes, one person's propaganda is another person's culture, and vice-versa. Just like I enjoy butterfly stamps from other countries, I enjoy understanding other cultures through their stamps, propaganda or not.

One other major difference. The PRC stamps of that era are currently far more valuable than the same US stamps of that era. How long that will last, I don't know. Relatively speaking, the US market has been far more stable, which can either be a good thing or bad thing, depending on how you look at it.
Enjoy your stamps, everyone!

k