No. Did all the time as a kid during the Mega Drive/ PSX era but I slowly started playing the games as I was supposed to early during my PS2 period. I learnt that playing is properly is simply more fun- although that may just be because I had the skill to beat them once I was older.
I used to mess around with them a lot in the PS1 era but very rarely up to now. Partially because they're almost non existant and partially because I like to play games for the challenge now (provided that the challenge is actually fun.) I still like to play around with cheats on PC games like Oblivion or some FPS but that aside I don't use them anymore.
The last time I did was when I was just screwing around in GTA4 with my cousin long after beating the game. He had made some game where he'd spawn helicopters, then go to Algonquin and elevate to the highest altitude and then jump out and try to bounce off the sides of buildings. Ha, I don't know how exactly he got that bright idea, but it was fairly entertaining.
Uhhh the last ones I used were in GTA IV, I believe, and I haven't played that game since about a month after it came out. You really don't see them too often anymore, do you? Maybe in, like, games based on movies, or in sports games, but I don't really play any of those. And any game that DOES have them that I play disables achievements when you use cheats, and rightly so. So, no, not in a long while.
" In The Sims, yes. "And any other game which requires me to have lots of money just to buy clothes for my character. I used them in Saint's Row 2 because I wanted better clothes than the bargain basement crap they gave me at the start. I wanted to look good! I used them in modded versions of the Sims 2 & 3, Oblivion and Fallout 3 to buy community-created clothes from community-created stores in the game. I don't use them to make myself stronger, faster or better. Just to look fabulous!
I only use cheats after I've finished a game at least once.
Normally in strategy games and GTA because they normally have some crazy things in the cheats.
The Age of Empires games always had weird units in them you can only get by using cheats.
Plus in GTA sometimes I just want to load it up, give myself infinite rockets and go around blowing shit up. Thats part of the fun.