I've been cheating at games since I got a Game Genie for NES. Games were hard then. I haven't found a need to cheat in recent times, other than for open world RPGs. The thing that triggers it is me being a completionist. When I can't carry anymore in my inventory and the game forces me to walk slow until I empty it, I know full well I'm just going to keep picking stuff up, or make multiple trips to town and back to loot absolutely everything, so I just turn on God mode.
~/tgm<return>
Then sometimes I forget to turn it off for the rest of the playthrough.