I'm feeling kind of nostalgic right now, so what are your top 5 NES games.   Here are mine in no particular order:

1.)  Megaman II

2.)  The Legend of Zelda

3.)  Teenage Mutant Ninja Turtles II

4.)  Super Mario Bros. 3 (had to edit because it is such an important game)

5.)  1943 (one of the hardest games I've played, have yet to beat it without Game Genie)

I wanted to put FF on the list but I'll just give it an honorable mention because the first time I played it was actually on FF: Origins for the PSX.  

1. Super Mario Bros. 3

2. The Legend of Zelda

3. Super Mario Bros.

4. Mike Tyson's Punch-Out!!

5. Super Dodge Ball

1) Super Mario Bros. 3
2) Contra
3) Tecmo Super Bowl
4) Double Dragon
5) Blades of Steel or Ice Hockey (toss up on this one)

Those are the games I had the most fun playing.  I would probably put Super Mario Bros. 1 and a few others on the list for what it did for Nintendo but I went with pure fun factor.  I also wanted to give a shout out to Arch Rivals.

1. Dragon Quest 4
2. Super Mario Bros. 3
3. Legend of Zelda 2
4. Faxanadu
5. Dragon Quest 3

I don't like Zelda 1, Metroid, or the first Mario; I find them kind of annoying to play. Although some games I would have liked to put on my list are Street Gangs, Castlevania 3, Dragon Quest 2, or Final Fantasy - I like all of those games.

SMB
SMB 3
ZELDA
WORLD CUP
FF3

1. Fester's Quest
2. Chip 'n Dale: Rescue Rangers
3. The Simpsons: Bart vs. the Space Mutants
4. DuckTales
5. WCW Wrestling

1. SMB
2. Punch Out
3. SMB 3
4. Zelda
5. Super Spike Volleyball

Ah shit!  Back when I used to be able to watch wrestling.  I thought you were talking about WWF WrestleMania for a sec though which is the main wrestling game I had on NES.

1. Super Mario Bros 3

2. Super Mario Bros.

3. Mega Man II

4. Castlevania

5. Super Mario Bros 2

1. SMB3
2. TMNT2
3. SMB1
4. Life Force
5. FF1