Never!!!

I cheat if my siblings have desided to delete my saves to catch back up, if that doesn't happen, I don't cheat... (Crackdown is an exeption, Keys to the City is so much fun)

if necessary...hahahaha XD

uhh if im stuck i find cheats haha

I use walk thrus and bug abuse and bots(on ragnarok online haha).. I use the walkthrus when im 100% done with the game and see what are the things/treasures/secrets i missed...

And oh sometimes i try to disobey the rules of some MMO's like selling game currency in exchange for real money. I think that's also cheating.. Hehehe.

But to cheat my own gaming skills...no way..

No.. since it takes the the challenging part of the game.. Although it cud be handy wen u only want to know the story

sometimes

im thinking of booting my cabal

First, I think it depends on how you define cheats.

If you mean things like codes, hacks and trainers, then no, I don't usually cheat until I've beaten the game. Exceptions are GTA (like most people have said) and other free-form type games, like TES4:Oblivion, and games like that.
On the other hand, some games have cheats that do nothing within the game, but are merely aesthetic or goofy type things (like Lego Star Wars). Those I have no issue with either.

Why? Well, I think codes and stuff are a sort of circumventing of the game, and I want to get the full experience. It also removes the need to try in many games. And I like to play through as the devs intended it, and as most of my friends will be doing so. In freeform games, it's different. They're so long, and so open, that it doesn't really feel like cheating to use cheats. It simply feels like one more alternative way to have fun. (I like to keep my cheating in its own save.)
The only exception I have on cheat codes is multiplayer fighting games. There I will use the codes to unlock all the levels and characters, but only if I'm playing with someone else.

As regards things like walkthroughs, yes, I use them. Why? Because I play games to have fun, not to spend 4 hours trying to figure out that the only way to beat a certain boss is to jump over him and hit him from behind while he's attempting to fart in my general direction.
Actually, bosses aren't usually the problem. It's usually the really annoying camera-angle puzzles, where you need to do something, but you can't see what it is.
So yes, I use walkthroughs, but I tend to avoid cheat codes, except when I'm just fooling around.

cheats are cheating i use them for fun not to complete the game so i never save my game after using one

If you means like walkthroughs, then yes, on some occasions when I'm albsolutely stumped on what to do.
But not like cheat codes or anything. I don't use those...except for playing The Sims. (Because it's more fun with cheats. xP)

Only if I have to.

I use walkthroughs but things like gameshark and those kinds things no way lol

I guess it depends 4 me now what kind of game it is ... !

Or maybe not