I used to cheat ALL THE TIME back in the 16bit days. Granted, I beat the games without cheating too, but if I ever felt like blowing through an RPG, I put a fast level code and and sat back and enjoyed the story without worrying about grinding or whatever.

I did that so much that I have burned myself out from cheating ever since. Hell, I never used any cheats in the GTA games (except for a couple of times in III just to see what they were like)!