Good question. I asked my patrons in a survey recently. Several pointed out that having lived in another culture (the United States) for more than two decades, I have the ability to compare and contrast life in different cultures. Instead of just sharing anecdotes or lists of characteristics related to French culture, I also try to provide context to explain behaviors that I know will (insert one) surprise/confuse/annoy visitors.  This has come in really handy as a tour guide leading private or group tours for English speakers around my homeland.