I'm too young to remember most of the "golden ages" of sport, but for boxing -- and particularly heavyweight boxing -- the "golden age" was clearly the 1970s, and I was growing up as it was occurring.
What a list of all-time greats: Ali, Frazier, Foreman, Norton, Lyle, and I probably forget some others. And all on free network TV! (Yes, folks under 35, championship boxing used to be on free television.) I suspect it was the combination of those characters, their skill and exposure on free TV that made me something of a boxing fan as a kid. When it went pay per view, it totally lost me. I can't tell you much of anything about boxing in the last 25 years or so. But those heavyweight bouts of the 1970s... to the extent two guys beating the crap out of each other could be magical, it was.