That makes your favorite games better?

Mine
1] The contra 2 30 lives cheat.

2] The infinite lives cheat for Shadow of the Ninja

3] The kill your team mate off to get his lives cheat in Double Dragon 2 NES.

Of course it's definitely more satisfying not cheating but if you've beat the game a few times and just want to play for fun without the frustration it helps a bit.