I hope the gameplay footage seen at E3 remains true to the actual release on PC and consoles, that's for sure. It would be nice to turn off illuminated ammo droppings AND enemies - when an enemy is close to death they glow or highlight allowing you to do that gory fatality-like finisher.
I'm assuming id will throw in some options to tweak all that though. The amount of enemies thrown into the levels during the preview is fantastic as well. Overall I'm excited to see more coming from id, even if the Johns left long ago. Now all I wish for is Rare to make a comeback and push another Perfect Dark *cough* out.