In contrast, for the entirety of FFXIII that I played (8 hours), I did absolutely nothing other than:
- watch cutscenes
- walk down one-path (and occasionally briefly-two-path-before-becoming-one-path-again) corridors
- press Auto to win battles
- try to fight manually, and realize that the actions I choose are always the same as the Auto actions (given that I have how many actions to choose from? I forget, one or two?), realize that manual battling requires just as little strategy/skill and only serves to waste time, and return to Auto battling from now on
No shops/armor/equipment, no sidequests, no minigames, no character customization, no strategy in battles, no exploration, no dungeons (just one long corridor per area), ...
To anyone who hasn't played the game, that's going to sound like an incredibly gross exaggeration, but I can assure you that I mean all of that 100% literally. That was my *exact* experience playing the game. Right at the end, I vaguely recall receiving a summon which seemed to add a little spice to the battle system, but it wasn't enough to keep me playing for another hour at that point.
Auto battle is the point of the battle system in FFXIII, if you're trying to do it manually you're doing it wrong. It's meant to be fairly fast paced and is easily the most involving battle system in any FF I've played.
Auto battle is smart enough to pick the right attacks when you figure out what the weakness of an enemy is, so if you are using ravagers they'll keep using different attacks until they find out say...fire is the what the enemy is weak against and then the ravagers on your team will continue to use fire based attacks. It's all about setting up the right paradigms and making sure you're using the right ones at the right times.