I suppose I am in a minority, having worked before the EEC, during the EEC and the EU (and may work post EU)
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I worked in Spain in 1979 before they joined in 1986. Although I needed a visa, green card insurance and a bail bond (get out of jail card). This was post Franco's Spain and the police could be a bit scary and the jails awful. I was always being asked whether I was a supporter of his which could have been problematic as he was very divisive.
Pre EEC: Left school/college 1972. Had numerous jobs, in a bank, in a factory (lathe work), farm labourer, van driver. No problems acquiring a job just did not know what I wanted.
I voted for the EEC accession in 1975. I was progressing a career in construction by 1974.
The main influence on my life, of the EU establishment, is the effect it has had latterly on the adoption of standard design codes throughout Europe (and the world) this is generally positive. The obvious use of metric measures. I was educated in imperial measure and metric both.
My belief is to have a stable community, it is necessary to have equivalence in economies. It is possible to bring on countries to this equivalence however not as full members. The tests that have been proposed for accession and also for membership of the Eurozone are never adhered to or complied with long term in my opinion.
I tend to be for out, and a looser trading bloc with counties free to maintain border controls as they see fit to suit their economies.
It is very well to say we need an ever larger population and build new towns, extend cities, schools, hospitals, roads, rails, power stations for ever. At some time, we will be totally dependant on imports for everything including staple foodstuffs because we no longer have space for an agricultural economy.
The balloon will burst one day in the future and we will have to reverse all this expansion, as has happened in previous eras.