For the good of humanity but also to try give the widest variety:
Super mario world - platformer
Final fantasy (which one i am not sure, not my expertise) - storyline rpg
Starcraft 2 - RTS
Need for speed - racing
Minecraft - creative

For me? The legend of zelda ALTTP
Donkey kong country 2
Pokemon Leaf Green
Super mariokart 64
Borderlands 2 (inc DLC)

I expect even a budget phone to still work the same after 1 year.

True, i agree with that. I will amend to be:

1. Lost Woods (TLoZ Ocarina of time)
2. Song of storms (TLoZ Ocarina of time)
3. SMW Overworld Theme (Super Mario World)

One? Ill narrow it down to three,

1. Aquatic ambience (DKC)
2. Stickerbrush Symphony (DKC)
3. Lost Woods (TLoZ Ocarina of Time)