Jaws is a LJN produced game, like I said, those are garbage.
Elevator Action is pretty fun... it's short, but earlier titles were like that. Deadly Towers was actually the best selling game of it's day. I think it's just "ok" but apparently I'm in the minority on that.
There are certainly mediocre games on the console, but due to the short length of nes-era games there is still fun to be had in those. There are very few bad ones though. Now the SNES and beyond is another story, but the NES had a pretty solid library with the exceptions I previously mentioned. My point was if you pull a random NES game out of a yard sale the odds are you'll enjoy it. With other consoles, including Nintendo consoles, the odds aren't always in your favor.