I Can’t Imagine A World Without…?
in regard to the OP…
chocolate.
starry skies at night.
at least not with me willing to live in it…
Music. And peanut butter.
I’ll take music one step further…sound…
…or light…
…or air…
…or water…
Things to ponder this coming Earth Day
Wife and Kids…
Food.
Hm… I think that’s my list. 
Assuming the real meaning of the OP is, “the world would be intolerably different without…” then my answers are:
stars
friendship
music
rainbows
home-baked cookies
individual personalities
soft, warm beds
love
human connection
cute, fuzzy animals
Hot running water in the house, my favorite modern convenience.
Garlic. Music&Dance. Duct tape. Ziplocks. Sunscreen. Soft toilet paper.
How many things do I get to keep when we change worlds?
…weapons. And lots of 'em.
… ME
. . . imagination.
…cheese. And subsequently, lactaid. Mmm…cheese…
…bad drivers. I’d like to, but reality insists upon reminding me of their existence every moment I’m on the road.
…double quarter pounders with cheese. Bad for you? Yes. Money would be better spent on real food? Yes. Ever-tempting harlots of speedy goodness? Most definitely!
…Junkyard Wars.
…home repair shows.
…Notre Dame football.
human contact
Oh and dogs
Cats
Dogs
Bacon
Variety
Laughter
That moment right before you orgasm
Blue jeans
My daughter
My wife
The Simpsons
Trees
Pumpkins
Quiet time on the bowl
Springtime
Books
Hair
Love
I’m gonna have to say music again… it plays a very big part in my life and if it weren’t for it, I’d be lost.
And humor.
Music
Love
Ice Cream
Pie
Snow
My family
Elmo
Blue
antidepressants
Wonderbras
Eutychus55
The Allman Brothers Band
Women.
Various metals.
Cinnamon Toast Crunch.
Women.
Books.
Beef.
Women.
oldscratch
coffee
(yes, in that order)
My son, family and friendships
chocolate
the mountains
on the other hand, I imagine every day how nice it would be not to go into work.