I would have to say:
1. SMB
2. Kung Fu
3. Ice Climber
I have grown up on the first 2 two, and just got Ice Climber about a year ago- that game can get under your skin pretty quick- that and Wrecking Crew!
This is my shiny thing, and if you try to take it off me, I may have to eat you.
Check out my dev blog.