These would have to be my top ones.

NES:

1. Super Mario 3
2. Duck hunt (with original guns)

SNES:

1. Zelda a link to the past
2. Mega man X
3. Chrono trigger
4. Super Mario world
5. Super Mario kart (with friends)
6. Earthworm Jim
7. Starfox

GB: Pokémon red, blue, or yellow

GBA: Zelda minish cap

N64: Zelda ocarina of time