Look, I grew up with Sierra adventure games. I have "Save early, save often" tattooed into whatever primal lizard mass is responsible for my survival. But on consoles, saving can be a pain in the ass: Hit Start, go to a sub menu, wait while it saves, come back out. Worse, the option is often buried somewhere as it ranks lower in the UI chain of command. So players get sent a lot of signals to rely on Auto Save. Which is fine, except that I've played at least a handful of titles whose Auto Save logic is so byzantine that its practically useless. Case in point: Kingdom of Amalur, a Fable-y action RPG. I completed 2 major story quests, a side quest, entered 3 new locations and at no point in that 50 minutes did the game save, a fact I didn't uncover until I died and suffered the game's weirdly punitive death penalty.
Is it so hard to just kick in an AS everytime I complete a quest or walk through a door? Jeebus. The original Mass Effect was also really awful about this. On the other hand, Uncharted 3 Auto Saves everytime you pause, which I appreciate.