The second major culture shock has been the way to do life. Actually, after 4 years, it's hard to remember some of these things but just "doing life" is so different. We eat dinner much later than the US and those dinners last 2-3 (maybe 4) hours with tons of discussion. People aren't as pressed to get anywhere or to get to work. People work to live, not the other way around, so family, conversation, and friendships are a priority.
I guess another major challenge was the lack of any sort of customer service. It can take 6 weeks to get internet and no one seems to care. Anyone can go on strike at anytime and it's just totally accepted because of the value of "worker's rights." So, the idea of being pampered or treated well all the time simply doesn't happen. That took a while to get used to, but once you do, it's not that big of a deal.