Cheater, Cheater. Compulsive Eater

I'm dead against cheating. Be it in a multiplayer or or a single player experience.
I do tend to use a guide if I'm stuck. Good game design can negate this as more often then not as it is because I don't know where to go or it's not clear what to do. Rarely I've used a guide just to get through a game if it has taken me quite a while, such as the original Mass Effect because I had both sequels ready to go.
I really regret using a guide to finish Braid because it somewhat tarnished the completion of the game. However this made me get through Portal without using any guides or YouTube clips at all.
aThere was once a game of Zombies which I was in that got to a mid thirties round using glitches but it was so unrewarding and boring I would jump out of a game if people wanted to use glitches. Which at one point was most of the players.
Some single player cheats take the fun out of a game. The Riddler challenges in Arkham City wouldn't be as rewarding if you could just cheat your way through. Even games from the 8 bit era which were worryingly hard felt hollow when cheating.
When it's time to use a guide or any kind of hack or cheat then that's down to the individual concerned. There is nothing wrong with that as long as it doesn't harm the actions of other players (for example in a multiplayer) game then that's fine. It is down to you and whether you can genuinely enjoy an experience if you are just running through just to get through.