The NES has somewhere around a thousand distinct games, if you count all markets and include unlicensed games (which there weren't that many of).

Maybe 200 of them aren't total trash. Perhaps 100 were genuinely good at the time. Low-tens of them are still at all worth playing for someone without nostalgia goggles—though, in some cases, that's because an entirely-superior remake exists; like, if you want to try the first three Final Fantasy games, you probably shouldn't play the NES versions, in 2023, unless you're aiming for some kind of "I want to experience them exactly as Old People did" sort of thing.