Sometimes the base level of aggression or the base level of inflection is way higher than what you're locally tuned for.

Anecdotally I have found even business conversations with people from the US to be over the top. Especially through the sales cycle. There is a lot of hype that I need to adjust for in comparison to vendors in the UK, Europe and Asia.

It's not a bad thing, it's a social standard. I probably appear quiet reserved and shy by comparison.