I would put it down to regular folks having a more relaxed attitude, less competitive toward life. Here in the US, we seem so focused on perfection in so many areas. The French are also more relaxed in decor. A crooked candle, a crooked painting, worn paint, etc. Not that it is true of everyone or in every part of the countries, but it is something I have noticed. Things are not constantly being upgraded or whatever, nor is concern for what will impress a driving force. JMHO