It's a bit strange coming in through passport control in the EU citizen line and being asked questions in Russian. The passport guy was just being friendly, saw I had lots of Ukrainian and Lithuanian stamps and assumed I must speak Russian.
I guess these days they have to cope with all sorts of people with EU passports, but they don't usually have time to be friendly. Still, one did once wish me happy birthday when he read my details.
The most unexpectedly unfriendly experience I had was in Denmark when I arrived with Bee during an American school holiday. The passport guy complained that she should have been in school.