"I am hoping on a Left 4 Dead style zombie. I hope to god nothing like tanks, hunter smoker, etc appear. The zombies would be the easiest except for their numbers which is how they get you in L4D 1/2."

"Well, there are essentially lots of different kinds of zombies. Let's take a look at the difference between the Max Brooks zeds and the Zombieland zeds, shall we?:
Brooks zombies: Slow, uncoordinated, feel no pain, do not require air to survive, can only be terminated permanently through destruction of the brain.
Zombieland zombies: Fast (relatively), still somewhat uncoordinated, but apparently can be killed with shots to the center mass and feel pain(ref. when Columbus is attacked by his neighbor and sprays her with the can in his bathroom, which impedes her temporarily). This leads one to assume that they also require air to breathe.
Personally(this may be just me) I'm inclined to prefer the Zombieland zeds. They may be faster, but they're significantly easier to kill too."

"Or there might be only a change like the hunger for flesh and pale skin."

"So your saying the zombies are racist?"

"Monkeys watching TV is not a realistic way to make a virus."

"I suggest our bodies are inhabited by ancient demons, us! Us without the higher brain functions that are like an operating system and run programs that are our cultural conditioning.

Our ethics, social constraints and all the rest that makes us able to live in vast groups are products of that cultural conditioning. And they, I'm suggesting, is why we do not rip a strangers head off because he jostles us in the street.

But those higher functions are fragile, too much stress and the subject starts displaying aberrant behaviour. Keep piling it on and you see more effects normally terminating in one of two extremes, catatonia and the reverse manias. Spectacular versions of the last we call 'going postal' for instance.

And remember the descent or decay we are talking about here has an effect on the people around the subject, more stress on his family, workmates and friends. Thus making outbreaks and epidemics quite possible.

So I propose in addition to the four groups mentioned above there's a 5th that relies on no outside agent apart from what we have done to ourselves in the shape of modern urban life.

Goggle 'behavioral sink' if your interested.
_"