Shooting and the darkness power are fun. Grabbing a car door as shield, then tossing it to slice an enemy. I'm not necessarily against cover but I like it when modern shooters introduce ways for you to be more aggressive. I liked how enemies went down quick, although that's probably just an early game thing because otherwise the skill tree would be mostly pointless.
What bothered me about this, and other games, are the unnecessarily long canned animations as finishing moves. Seeing your tentacles chest burst through an enemy is neat the first time but after three or four times it starts to just feel like 5 seconds of loading. It's reminded me of Splatterhouse.