I did an internship in Armenia and one of the biggest culture shocks I faced was the system of trust between people:

1. Buses in the capital, Yerevan, were always packed and people paid the fare (about 25 cents) AFTER they got off the bus. Because it was so packed, many couldn't reach the driver so they would pass their 100 dram coin to other passengers until it reached the driver. In my entire 3.5 month stay and riding buses a few times a day, I only noticed one person run off the bus without paying and half the people on the bus yelled at her to come back and pay.
2. If the bus is full and you're standing, passengers will offer to hold your purse or bag for you. The first time this happened, I thought the person was trying to rob me, so I smirked and declined politely. Later, I saw that this was common practice and sometimes elderly ladies would insist that I give them my groceries so that they could hold it on their lap. Yes, the people in Armenia really are that nice.
3. The streets were safe. I was told that rape and kidnapping are very rare and I would see children as young as 5 years old crossing the street and going to school on their own.
4. I visited a rural village in Artsakh (Ngorno Karabagh) and watched in amusement as a young boy of 12 drove a truck.
5. I was treated like family every time I stepped into someone's house or a restaurant. People were insanely nice and welcoming, even going as far as to offer to invite me over for Armenian barbeque and spread out a table with the finest appetizers and Armenian delicacies.
6. The staring- for an entire month people would not stop staring at me. I live in Los Angeles where it's sometimes considered rude to look at someone for too long. I learned later that this is normal.
7. My biggest culture shock was when I was standing in line at Zvarnots airport and a man asked me if I would store a few of his things in my suitcase because him and his wife's were too full, and that he would pick it up when we landed. I was shocked since this is usually against airport security law, and I initially thought that he was trying to dupe me. Later my host sister told me that it is normal and the level of trust that Armenians have with one another is very high, so they help one another out like this sometimes. (I think he eventually found someone else lol.)