Light hearted!
People who married someone from a different culture: what was your biggest challenge? Did it change over time? What was the best thing about being with someone from a different culture?
At the start of our relationship my DH and I had so many differences to work through, e.g. the role of family members, language differences, navigating things like irony, etc. We have quite similar core values so luckily the differences turned out to be quite superficial in the end.
Nowadays I'd say the biggest challenge is the difference in sense of humour!
My favourite thing about DH's culture is the commitment to family and the unconditional support they offer one another.