Just finished Dead Space 2 on Normal.
I actually enjoyed the story a bit more in this one once it picked up. However, there was not a single boss battle the entire way through -- once you get to Chapter 8 or so, it becomes a lot more narrative driven. Which I kind of liked, honestly. It felt like a true sequel to the first game -- now that they know what the enemies are and where they come from, they decided to spend this game exploring what happened to Isaac after he escaped. It definitely carried a different vibe through the whole game.
I got most of the trophies during my first playthrough, so now I'll have to go through and play it on Zealot mode. Or perhaps try Hardcore mode first, then go for Zealot mode. Still trying to decide at the moment.