Blades of Steel (my friend and i still play it on my NES to this day)
Duck Hunt (with gun of course)
Super Mario Series (all of 'em... 'nuff said)
I was a child of the 90's, so I was more into super nintendo. I didnt really like the first Zelda (i'm sure that thats blasphemy to some people). Most games that I've tried on the NES are too outdated, they arent stimulating enough.