So what *do* you believe in?

Often when told that a person doesn't believe in God or the supernatural, someone will ask, "So what do you believe in?"  The implication seems to be that if you don't believe in God, then you don't believe in anything, which is of course a logical fallacy.  When asked this question, my answer is thus:

I believe in my family.

I believe in my friends.

I believe in my country.

I believe in the human race.

I believe in the world I live in.

I believe in this grand and glorious cosmos.

And I believe that's enough for one man's lifetime.