I would start conversations the "French way" to debate certain aspects of how/why things are done, but it backfired because I did it in a clumsy way, without considering the cultural gap and how people were expected to communicate at this company.
Today, I easily switch between American and French styles, but it took me a while to understand what my California-based coworkers meant when they said "it's more important to be kind than to be right"!
Curious to hear if this happens to other expats too.