I've stepped on both, and the least painful is the four sided die.

Would you rather wear all black or all white?

All white. I can snow-camo!
*Is dying at my own bad English there*

What's your favorite culture?

Japanese. It's so unique. (Also, wrong thread, Law =P)

Would you rather eat only green vegetables, or only red meat?

I would rather not talk at all.

Would you rather be able to live forever or stay mortal?

Ack! Wrong thready...Nuuuooooo!
*Is tossed into the pit of eternal peril*

Normally I want to stay mortal. But today is a rare day in which I would choose immortality.

Would you rather die in the fire or in the bitter cold?

The cold. You go numb and can't feel a thing.

Would you rather live one life forever or be reincarnated into many lives forever?

As long as I can retain the memories from the former lives, reincarnation.

Would you rather have Spaghetti or Lasagna?

Spaghetti, provided it was in white sauce.

Would you rather be a Power Ranger or a Sailor Senshi/Scout?

Sailor Scout. It's magical =3

If you lost the ability to see a color would you rather it was red or blue?

Uh. Blue. I like blue. :3

If you had to choose, which sense would you rather lose, your sight or your hearing?

Hearing. They have things for deaf people to regain their hearing!

Would you rather understand/speak every language known to man, or have the ability to speak to animals?

You know how to present a challenge. xD
Hmm If I could just relearn English, then the ability to speak to animals.
If I couldn't relearn it, I'd go with every language for man.
I mean, in a world dominated by humans, I'd run into some serious problems if I couldn't communicate with them. I'd be number 1 on the endangered species list. XD

Would you rather; Be able to fly, or be able to turn invisible?

Be able to fly, always. I love flight, flight mechanics, etc.

Would you rather answer this question, or create your own question?

Answer that question. DX I suck at creating questions...

Would you rather be a Good Hero or a Bad Villain?

Good hero, though a bad villain would be funny to watch.

Would you rather be made of living wood, or living steel?