I cheat in all of them. 
I do usually do a playthrough once with no changes, mods, cheats, etc., to get a feel for the game and how it works and so on, and then I'm all about finding the cheats and the mods. This is one reason I waited about a year to get DA:I, actually. I wanted to wait for the modding community to come up with some good stuff, and for the online cheat guides and so on to be available (and I also wanted the read the reviews).
I use tweaks to fix stuff that annoys me, but mostly I do stuff like edit save files to alter things like money. I know, I know, you gain money as you go, yadda yadda yadda, but I don't need a game to remind me that it sucks to be broke and to want to buy stuff you can't afford.
I play mostly for the story, anyway, so having characters with really good armour very early on doesn't make me enjoy the game any less. Rather the opposite. The combat is always the least interesting part of the game to me, so anything I can do to make it so I can breeze through it pleases me. I'm one of those "Yeah, yeah, kill some stuff, now back to the party banter!" sorts.
I don't even really see it as cheating, to be honest. It's just adjusting the environment so I better enjoy my time spent in it. If it were a multiplayer game and I was cheating, uh, yeah, that would be an issue, because it's unfair to other people, but I only ever play in single-player mode, so the word "cheat" seems kind of wrong. Tweak, adjust, alter, sure. But to "cheat" implies some sort of unfairness or wrongdoing, and I'm certainly not doing anyone wrong.
