NUUUUUUUUUUUUU! NO HURTING OF THE ASMO!
I'd say zombies because of the fact that if you get turned into one, your brain goes to mush. They are the actual one that you want to not turn into. Sure ghosts are pretty funky but if you can phase the bullet correctly with our uber smart team of scientists then they are no problem. (Ever seen the ghostbusters?)
Vampires, well if you turn into one of them all you have left to fear is daylight. I'm a night dweller anyway so hey that is no problem for me. Werewolves.............c'mon "Bad Dog eat silver." And Asmo...well we all know the best way to stop an Asmo is to push 'im down the stairs.
Finally the Elder Gods or whatever they are. Big things? Coming to destroy us? Hey I don't mind it awesome way to go.