What was your biggest cultural shock after moving to Finland?

I'm working on a new article for r/Finnopedia about cultural shocks/its stages and stumbled on this article from Visit Finland. It describes 5 major cultural shocks expats are having from living in Finland:

  1. Personal space
  2. Social conduct
  3. Nudity
  4. Climate
  5. Communication

For me the biggest shock was communication and social conduct, as I'm an extravert it was really difficult to get used to it, but I guess over 12 years that I've been living in Finland I became more balanced :)

What was your biggest cultural shock after moving to Finland and when it came?