First off. Dark Souls is a RPG. Do you know what an action rpg is? Thats what Darksouls is.
Secondly you do know the game saves all the time right? If real life calls you can just exit the game whenever you want, and when you get back in the game you're right back where you left of. Bonfires aren't save points.
24/7 autosave.
No, it's really not. There's very little difference between Dark Souls and, say, Rage, both of which are actioners, with some RPG and adventure elements. Yes, I absolutely know what an action/RPG is, and Dark Souls isn't even anywhere close to being an RPG, no matter how you want to bill it. ME2, action RPG, but only barely, same as DAII, DA:O was the closest of the BioWare titles to RPG. Witcher, Witcher 2, Risen, Risen 2, Gothic 3, Gothic 4, action/RPGs. Dark Souls is an action game, maybe requiring a little more in the cerbral-fighting department than your typical button-masher, but still an action title.
I played it on Xbox and no, it does NOT save all of the time, only at bonfires (and waypoints maybe? or was that Dungeon Siege III?), not whenever/wherever you want to save. So, oh yes, I turn it off and there I am, back where I was "last" save, NOT where I left off, ever. Maybe PC has this? Xbox definitely did not.