These markets were literally flooded with massive volume in games. You went to the store and could literally not decide what you wanted to play, because there were 30+ games you had never seen, you wanted to play them all, and another 30+ for a console you didn't own. And then a few months later, there were 20+ new ones.
All of these games were relatively simple, creative, outside the box, not hyped nor mentioned in any advertising anywhere. And almost all of them kicked ass. Because they were still analog cartridge-ey and/or required a CD to play, you didn't want to own hundreds of games (even though you could because most were priced very reasonably), so it was amazing when things like Sega Channel came out. That was one of the truly awesome things I remember as a kid, even though it was short lived.
I miss those days. Now it's AAA title that took 3+ years to make that looks good but has almost nothing to it. Back then, a $5 game that took a company 1 programmer, 1 artist, 1 sound engineer, and about 2 weeks to make had significantly more playability to it. What happened to the industry?