England '88.
I was almost 9 years old and I was lucky enough to be there with my Dad and 2 of my brothers. I realise how extremely lucky I was to be at that game at such a young age. The unreal experience undoubtedly shaped a large part of the rest of my life and personally it can never be beaten.....even if we actually ever managed to win the Euros/World Cup. Sounds crazy, but I honestly believe the impact that England game had on me as a kid could never be eclipsed.