i have a question:

do player-zombies look really different from Ai-Zombies?

Yes

Player zombies look like the player they originally were, but hunched, hands raised a little, mutilated and spattered with blood. They look extremely good.

i dont think a suicide button would work, or feel like a real zombie movie... i mean if ya look at them, everybody who has been bitten doesnt kill himself, they live as long as possible, die, and become zombies and their friends shoot them right after that. also their friends drag them along as long as possible. cant even remember seeing a single suicide so far.

and losing health when not eating as a zombie.. well.. as far as i know they actually dont *need* food, they just have the urge to feed. else there shouldnt be those huge masses of zombies (because not all of them would get food, thus, live. or stay dead. or whatever.)

i think zombies should have no other reason to kill humans then to have fun. turning on your teammates. i havent seen anybody not shooting a zombie in ZP. or not eating a survivor. now survivors might be more motivated to shoot zombies, since they already have masses persueing them, but i think those people who will "mess around" will just be that minority taht will do that *anyway*. yknow, type that shoots everybody at spawn in CS, blocks doors when FF is off and so on.