I'm playing Dark Souls for the first time, about 20 hours or so in. I don't normally touch action rpgs, like many other codexers I imagine, but the game just plays gorgeously. Seriously impressed.
Actually, I think I fell in love with it from the opening video, which is pretty bizarre for me! The whole package just fits. From what little I've seen so far, the art direction, sound, setting & writing have all been spectacular and--something which is quite a feat in the fantasy genre--full of personality.
I've had a couple of irks... I picked up a giant axe which is over-sized to a stupid extent and I'm worried equipment is going become increasingly absurd at higher levers. Games for windows live has given me grief but I don't imagine the developers had much choice regarding the PC port in general. Multiplayer has been iffy and slightly spoiled by annoying invaders. At the same time, however, my character was unable to effectively wield that axe due to low strength and could only perform a single, off-balanced swing with it. Considering how ruthless combat can be, it was quite cool that the game also deemed the axe too ridiculous for use (although I fear that won't last long). Likewise, I'm also very impressed at the way the game has intergrated multiplayer (and a number of other mechanics) into the setting in a non-egregious way. It could be a lot worse!
I think this game is going to be a classic.