Make sure if you get mario for NES you get SUPER mario bros, because regular mario bros is like a room with the pow blocks game, very not fun. Also definitely get Mario 3 and Starfox 64 if you liked it. I reccomend never buying a game based on a "i might like this" because anything I did that with I regretted buying the game.
all the n64 games on their are good and are worth downloading. donkey kong country 1 and 2 not so much 3. super mario bros 1 and 3. and all the sonic the hedgehog games.