"NJ ‘Nothing the EU does significantly affects me in daily life (yet, but it would if we remained)’
How?"
It doesn't matter because we are leaving. However, the most significant to start with is their undoubted ambition (which would be fulfilled) to gain control over UK fiscal affairs (such as VAT rates, income tax rates and so on) followed by the almost certain cessation of the UK's opt out from the euro. That will have a profound influence over all our daily lives.