Country Bias - Is it real? 🌎🌍🌏

Do you believe in country bias?

After listening to Alexander Fitzgerald Audible, I was wondering if others give such weight to one's nationality.

I believe it can certainly give indicators to a player's style. There must be influences that seem to dominate a region and result in geographical tendencies. For example, I never seem to know where I am in a hand with Asian players, whereas central Europeans are methodical and tend to follow "textbook" lines, etc.

Does anyone else change their strategy based on other player's nationality? What tendencies have you observed?