Syndrome "broken record" ...

If there is a title to perplex, it will be Diablo 3. The graphics rather surprising at first, quickly proves so pleasant that even the "gore" becomes aesthetic. From the first grip, we discover a choice of classes relatively small but sufficient in the end. The only regret is the inability to customize your character in its physical aspect as in his ability (able to mix a barbarian with a wizard to make it a war mage would have been nice for instance). So is started in "normal" mode for a first dark act at will with the ability to adjust the power of the monsters at his discretion, and that's a great idea for against allowing either to adventure smooth or with a real challenge, of course, varies loot :) function.
Which made me actually puzzled first, is that once that first campaign in "normal" mode is complete, we have no choice but to retype everything this time in fashion "Nightmare", then again the same in "hell" and "Armageddon." The same places, same characters, same quests ... indefinitely, like a broken record that permanently return to his starting point. The only variation being the power of enemies to fight and quality of collected objects.
Allow access to other places, adding side quests (almost non-existent elsewhere) as and measuring our progress was, however, very significant and this "forgetfulness" is quite regrettable.
What puzzles me second, is that despite the repetition loop of adventure fact very trivial in maps without interest, the game finds a way to be addictive. And it may be well at this level that Blizzard has managed a tour de force :)
PS: still not understood the subtlety of the "secrets" that concern our fellow adventurers or some NPCs as the Shen Cupid and seem completely devoid of outcomes ... "truth" in a future add-on?