Last time round, Belgians gave our health service the highest score of any country's respondents. I had looked at the previous questionnaire and was expecting to answer questions about television and drinking habits, but they were not asked this year. Instead there was a substantial section on energy policy and climate change, as well as the core questions about politics (including immigration) and general well-being.
Obviously I am a bit of an outlier on various important metrics, but I guess that they will average my answers in with the other 2,999 across Belgium, and indeed the others across Europe, and come up with the necessary statistics comparing Belgium with the other 24 participating countries. The whole process lasted an hour and a quarter - probably went quicker because I had done my homework - and is probably the longest conversation I have had in Dutch for many many years. (The interviewer complimented me on my taalkennis.) I am already looking forward to seeing how my answers correlate with those of the population as a whole.
I hope the UK stays in this initiative post-Brexit - non-EU states have always participated, but of course this project means engaging with experts, some of them foreign, so I guess we can't take it for granted.