I like your reviews, but don't agree with you on Dead Space. The game may have some repetitive parts, but definitely not enought to object to. It really depends on what is being repeated -- if you are repeating enjoyable gameplay elements there is no problem. I mean take chess or baseball -- they are both plenty repetitive, but people still come back for more of the same.
I am not a hard-core gamer, so I also care about the graphics and environments. Those are incredible here. The visuals and the sound are very immersive. The game is scary, at least to me, enough to need to take a break every 30 minutes or so. I love the feeling of dread and intensity that stays with you during the game, but don't want a heart attack! So I take a break.
The immersion factor is greatly helped by the unique menu mechanism. While you use menu or map, you stay "in the game". This is brilliant.
The other thing I want to mention is that the game on easy setting is very friendly to casual gamer. The control scheme is very well done, and doesn't require some ridicoulous button combinations that take forever to master. I am sure you played a game that in order to pass to another level required you to press: button A + button B, followed by left trigger, followed by scratching your right ear with your left hand, followed by three short presses of button C. Dead Space doesn't have any nonsense like that.
One thing I don't like is the map in the game -- the control is not very elegant. But there is this path finding device your character has -- press it, and there is a thin "laser" line pointing the path to your next objective. This is very elegant, and is probably useful to both, casual and hard-core gamers.
I am not a fan of EA, but Dead Space is top notch. I hope people give it a chance.