That's a tough call, but I'm leaning towards sometime right around the end of 1970's, or very early 1980's. The beginnings of the "personal computer revolution". Not to mention one of the greatest eras of all time for music. Imagine seeing Black Sabbath, Judas Priest, Iron Maiden, etc. live back when they were in their respective primes... wow. Or seeing an early Motley Crue playing at the Whisky A-Go-Go. Or attending the Moscow Music Peace Festival. Not to mention the 80's when hair was big, skirts were short and... well, I'll just stop there.