Well, when people say 'silver ages' and 'golden ages' they're usually referring to a stylistic era, not whether or not the stuff coming out during that time was better or worse than any other time. For instance, comic books from the 'golden age' of comics weren't really that great artistically, or even narratively (they were mostly made for young children), 'golden' just refers to the fact that that was the early days of comic books, and it ends with the introduction of different art styles and comicbook regulations that made more mature stories possible (in the early 70s I think).
In that sense, I'd say the golden age of games started with the original games, pong and whatnot, and ended with the NES. The silver age lasted from the beginning of the 16-bit era till the introduction of the Playstation, when 3D graphics became possible and popular acceptance of videogames as viable adult entertainment began the modern age.
If you're referring to just the fun-ness of the average game, I'd say now is the best time to be a gamer. Old games usually are fun to think back on, but they are for the most part best left to nostalgia.