I'm all for using codes for fun, but I just don't see why people would do it off the bat! Well, OK, I can see why, but in my opinion there's so much excitement in playing through the game brand new and finding your first baseball bat and beating some bum in an alley down with it, finding your first .45 and offing some random businessman who happens to cross paths with you etc.
Yeah I plan on using Cheats later down the line after I beat the game, I'm hoping for some good ones like Vice City and San Andreas, Riot Mode (The cheat that set it so it'd look like the Riot from end game all over) and Pedestrian's Riot/Peds Attackwas awesome in San Andreas, put in Peds have weapons for extra fun.
Personally in V I'm hoping for a Debug mode like someone else posted (Fat chance I guess but other games in the past have had it and it would be awesome), or something like the Carmagedon mod from IV.
Currently Playing: Dragon's Dogma: Dark Arisen, Skyrim, Max Payne 3, Currently waiting for: GTAV, LR:FFXIII, Grid 2, Gran Turismo 6