As fun, interesting, and challenging as these types of games are (DD, FF7 on the PSX, etc), it's just far too much information to absorb to risk the chance of royally screwing up your savegame. Having to work through all that challenge 24/7 quickly makes the game very unfun to me because I tend to go too far too fast or I'm stuck in an area I outgrew 10 levels ago. Having a walkthrough or a few cheats to employ allows me to nudge the gameplay forward from time to time when I don't want to keep racking my brain for a solution.
