The different scare tactics didn't bother me. I liked dropping that ladder almost on top of that Volks soldier!
The only thing(s) I hated in this game was the Volks battle and the second Cord battle.
The Volks battle was SO FUCKING HARD!! It says at IGN that you're supposed to possess the rockets when he shoots them at you and run them back at him, but when I did that I lost track of Raimi. I finally found him possessed by a Spectral Operative (one appears whenever you take away a quarter of Volks' health, which is roughly the damage the rocket does) who was running him into one of the fireplaces.
I finally won by just shooting Volks and any Spec Ops that appeared.
[spoiler]Also, there's only one Health pack in that fight FFFFFF![/spoiler]
As for the second Cord battle...you had to possess any one of the five Heavy Soldiers or one of the two Gun Cams in the room in order to take out Cord. If your soldier or Gun Cam got destroyed. you just move on to the next possessable body. But it doesn't help that you have to make sure that the engineer, Walters, doesn't get killed, and he's standing right in front of the daisies door, a sitting duck! For me, I used up all five soldiers and both Gun Cams and had to resort to finishing off Cord with Walters' rivet gun. Really the only thing I hated about this fight was the fact that Walters could easily be killed if you were too close to him so that the soldiers and Cord and the Gun Cams shot at him as well as you.
BAWW long rant.