Personally, one of my favorite games for NES and still plays strong now that it did back when I was in second grade.
User Rating: 8.9 | Hoshi no Kirby: Yume no Izumi no Monogatari NES
I remember by best friend growing up bought this game and invited me over one day after school to play this. I ended up staying over, and we played this until we completed it. It was so much fun back in the day and even today it holds up very well. I suffer greatly from nostalgia so every now and then I'll go back and play games that take me back to my childhood, especially Kirby. The graphics were so colorful for its time, and the boss battles in this game were the best. Though being a bit short, the game had some difficult moments, and the ending boss always gave me a run for my money. That was when I was younger, at least. This is probably one of the best platformer games to date, and I hold this gem as one of the best for the NES. 
