9 years ago in Switzerland with my mixed-race then-fiancé. Being stared at when we held hands in public, not in a hostile way but it was clearly very unusual to see a mixed race couple.
10 years ago visiting friends in the US, being shocked at how comfortable everyone seemed with talking about how much they earned, how much their jewellery cost and money in general.
Living in Italy 10 years ago, again being shocked at how the women would run around seeing to their male family members' every need while they watched the football. And the TVs in every restaurant showing football, even the upmarket ones.
Poznan in Poland last year: how beautiful the architecture was. I was expecting grey Soviet concrete but it was stunning, especially in the city centre. I'd gladly go back to explore a bit more.
Shanghai 3 years ago: how awesome (in the original sense of the word) everything was. The sheer scale of the buildings, the crowds, everything was just staggering. I spent a wonderful day packing in as many of the sights as I could and know I barely scratched the surface. I was also vaguely surprised at how different things were: bamboo scaffolding, all the street signs in Mandarin... It sounds ridiculous but it made me feel how incredibly privileged and arrogant I was as a western traveller to have everything handed to me on a plate in most places. I got very lost trying to find a hotel and ended up having a police escort
Everyone was so friendly and welcoming.
Living in Sweden 11 years ago: the communal showers after swimming
I never really got used to that but then got back to the UK and thought nothing of wandering around naked in the gym changing rooms so it must have rubbed off after all.
Reverse: walking into an Afro-Caribbean barber's to get my son's hair cut and being refused service. I'd never experienced racism before that.