Footage isn't really doing it for me so far...
Reason being, there were a lot of great things about Dead Space. The sound effects and atmosphere it creates are probably the best I've ever heard in a game. The initial shocks and how the game started were brilliant, when you had no weapons and just had to run.
What I really didn't like about Dead Space was that they had a really great idea, but didn't seem to imagine some aspects of it that well. As others have already pointed out, the whole being sent around the ship to pick things up, or fix things for someone else was annoying, but also quite an old gameplay mechanic. You also knew that whenever you fixed something, he was only going to call and say that something else didn't work.
I'm also not a fan of games where your character doesn't speak. I know a lot of developers claim that it makes you feel like the character, but I feel the opposite. A good story should have you siding with the character, when you are left to make up the characters personality and mannerisms yourself, I feel it's the opposite, like its less involving. Even Master Chief at least speaks. As Issac, he is barked at to go and fix all these tasks, and yet not once does he ever say...
"Oh, now what's broken...."
or...
"Come on! Why can't you get down here and fix something for once!"
The final annoyance is that it's a game that was said to be redefining survival horror, yet it became all to predictable. The second you walk into a room, or backtrack, you immediately turn back around to the door you've just come in from, because you know something is going to come from where you've just been. It was just too obvious, rather than getting the jumps it could have done.