You do know how to tell a Finnish extrovert?
He looks at your shoes when talking to you rather than his own.
I also worked with Swedes. Some of my Swedish friends tell me that I've never met a Swedish extrovert. If Swedish introverts run naked down the halls after a few gallons of glögg, I'm not sure I want to meet an extrovert. I already have 5 grandkids.
/johnny