Demons Souls...greatest game of all time? More like most boring game of all time. I platinum'd it a while ago, and did so by literally just running through the entire game. So anyone who says "You can't just rush through it like you can every other game these days" is wrong. The only hard part about the game is suffering through hours upon hours of doing the same, tedious grinding while you wait for a shard or chunk of a certain stone to drop from an enemy. Go stick some pencils in your eyes, it's more fun and looks better than Demons Souls.
In my opinion, of course.
so much wrong with this post. first off, there's no way you just 'ran through' your first time through unless you were glued to a guide (most likely a visual one on youtube)... it's laughable at best to think you instantly understood and handled world tendency, etc, not to mention simply 'ran through' the poison swamp (or many other worlds for that matter).
second, the few things you need to grind for are -only- for a platinum, so have no bearing on whether the game is boring/grindy/tedious. you made it that way for the plat, but it's not even remotely part of the core game. and even the plat only requires one hard item grind (the rare pure bladestone), other than that, most stuff comes fairly naturally.
third, if you rushed through it to any degree using a guide, completely removing a huge chunk of what makes the game great (discovery/exploration/achieving success), then, yea, you missed out. No surprise you didn't find it as enjoyable.
but honestly, the idea that you ran through the game for a plat on your first try is so ridiculous i think you're just trolling of the 'i beat ninja gaiden on my first try, with my eyes closed' variety.