Nah Seriously! For geeks only. Name 3 things you can't live w/out ?

oxygen, water, sleep

sun, gravity, 3 dimensions

Now, my life would be very different without the Internet, soy protein, and the free software community.

I dont think the question was intended to be phrased in regards to 'physical' needs, but I understand and agree with your intent. I would also have to second the vote for soy protein.

Internet, emacs, putty

motivation, internet, music